EP3944026A1 - Uhrwerkmechanismus mit zählkette - Google Patents

Uhrwerkmechanismus mit zählkette Download PDF

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Publication number
EP3944026A1
EP3944026A1 EP20186888.2A EP20186888A EP3944026A1 EP 3944026 A1 EP3944026 A1 EP 3944026A1 EP 20186888 A EP20186888 A EP 20186888A EP 3944026 A1 EP3944026 A1 EP 3944026A1
Authority
EP
European Patent Office
Prior art keywords
wheel set
frame
train
mechanism according
counting chain
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP20186888.2A
Other languages
English (en)
French (fr)
Inventor
Julien CATTANEAO
Pierre-Alain Graemiger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rolex SA
Original Assignee
Rolex SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rolex SA filed Critical Rolex SA
Priority to EP20186888.2A priority Critical patent/EP3944026A1/de
Priority to JP2021118441A priority patent/JP2022021328A/ja
Priority to US17/378,885 priority patent/US20220026851A1/en
Priority to CN202110822690.9A priority patent/CN113960910A/zh
Publication of EP3944026A1 publication Critical patent/EP3944026A1/de
Pending legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04F—TIME-INTERVAL MEASURING
    • G04F7/00—Apparatus for measuring unknown time intervals by non-electric means
    • G04F7/04—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator
    • G04F7/08—Watches or clocks with stop devices, e.g. chronograph
    • G04F7/0823—Watches or clocks with stop devices, e.g. chronograph with couplings between the chronograph mechanism and the base movement
    • G04F7/0833—Watches or clocks with stop devices, e.g. chronograph with couplings between the chronograph mechanism and the base movement acting perpendicular to the plane of the movement
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B13/00—Gearwork
    • G04B13/02—Wheels; Pinions; Spindles; Pivots
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B13/00—Gearwork
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B13/00—Gearwork
    • G04B13/001—Gearwork with the choice of adjustable or varying transmission ratio
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B13/00—Gearwork
    • G04B13/007—Gearwork with differential work
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B13/00—Gearwork
    • G04B13/007—Gearwork with differential work
    • G04B13/008—Differentials
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B19/00—Indicating the time by visual means
    • G04B19/06—Dials
    • G04B19/08—Geometrical arrangement of the graduations
    • G04B19/085—Geometrical arrangement of the graduations varying from the normal 12 hour arrangement
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B33/00—Calibers
    • G—PHYSICS
    • G04—HOROLOGY
    • G04D—APPARATUS OR TOOLS SPECIALLY DESIGNED FOR MAKING OR MAINTAINING CLOCKS OR WATCHES
    • G04D3/00—Watchmakers' or watch-repairers' machines or tools for working materials
    • G04D3/0002—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe
    • G04D3/0017—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe for components of gearworks
    • G04D3/002—Watchmakers' or watch-repairers' machines or tools for working materials for mechanical working other than with a lathe for components of gearworks for gear wheels or gears

Definitions

  • the invention relates to a timepiece mechanism.
  • the invention also relates to a timepiece comprising such a mechanism.
  • the invention also relates to a method for mounting such a mechanism.
  • the document EP2515186 describes the arrangement of a planetary gear train in a going train, with the aim of reducing the number of mobiles and thus increasing the efficiency of the transmission.
  • a barrel drives this planetary gear train through the satellite carrier(s).
  • the planet or planets mounted on the planet carrier(s) mesh simultaneously with a first planetary fixed to the frame of the movement and with a second planetary.
  • This second sun gear comprises a wheel kinematically connected to the escape pinion.
  • the document EP0195742 describes an astronomical watch comprising a planetary gear train making it possible to achieve transmission ratios necessary for the display of at least one astronomical quantity.
  • a first sun gear and the planet carrier are driven by the basic movement.
  • the document EP3368950 describes a countdown chronograph mechanism, which makes it possible to reverse the direction of rotation of the display of the chronograph seconds depending on the display mode of the chronograph. More precisely, when a countdown is programmed by the user, the display of the chronograph seconds rotates counter-clockwise and then, at the end of the countdown, the direction of rotation of the chronograph seconds display is automatically reversed to rotate in the direction conventional. To achieve this, a planetary gear train is arranged upstream of a clutch device which makes it possible to kinematically link the going train to the chronograph counting chain.
  • This planetary gear train comprises a first sun gear driven by the going train, a second sun gear intended to drive the chronograph seconds mobile via the clutch device, and a planet carrier comprising a planet gear meshing simultaneously with said planet gears.
  • the satellite carrier is intended to be stopped by a countdown mechanism depending on the display mode of the chronograph. In other words, the direction of rotation of the chronograph seconds display depends on the rotation movement of the satellite carrier.
  • the document EP0772104 discloses a chronograph count chain architecture.
  • This counting chain connects a mobile of the chronograph hours counter to a mobile of the chronograph minutes counter. This is driven one step per minute by a finger included in a chronograph clutch mobile.
  • This architecture implements very few mobiles, which makes it possible to obtain good efficiency with regard to the counting chains known from the state of the art while having a relatively small bulk. In addition, this also results in a low gear backlash which can be controlled by a single and unique indexing device for the entire counting chain.
  • chronograph counting chains are generally meshed with the second mobile of the basic movement going train chain, by means of a clutch device .
  • the reduction necessary to obtain a display of "12 hours” is 720 and 1440 for a “24 hours” display (one revolution in 24 hours).
  • the blanks provided for pivoting the mobiles of such a counting chain can hardly pivot the mobiles of a counting chain whose gear ratio is lower. This involves developing blanks for rotating the 12-hour display mobiles and developing other blanks for rotating the 24-hour display mobiles.
  • the object of the invention is to provide a watch mechanism making it possible to improve the known devices of the prior art.
  • the invention proposes a timepiece mechanism making it possible to achieve a high reduction with a restricted bulk.
  • the invention also proposes an assembly method making it possible to produce with the same blanks a watch mechanism allowing a chronograph display over 12 hours or over 24 hours.
  • a mechanism according to the invention is defined by claim 1.
  • a timepiece according to the invention is defined by claim 12.
  • a mounting method according to the invention is defined by claim 13.
  • timepiece 120 One embodiment of a timepiece 120 is described below with reference to the figure 1 , 2 , 3 , 6 and 7 .
  • the timepiece 120 is for example a watch, in particular a wristwatch.
  • the timepiece 120 comprises a timepiece mechanism 110.
  • the timepiece mechanism may be a timepiece movement intended to be mounted in a timepiece case in order to protect it from the external environment.
  • the watch movement 110 can be an electronic movement or a mechanical movement, in particular an automatic movement.
  • the watch mechanism 110 can be included in the watch movement.
  • the watch mechanism can be a chronograph module.
  • the counting chain is advantageously an hour counting chain.
  • the count string may additionally be a minute count string.
  • the hour counting elements and the minute counting elements are advantageously linked kinematically, in particular by gearing.
  • the first and the second sun gears 33, 34, as well as the planet carrier 31, are coaxial along an axis A3.
  • the satellite 32 pivots in the satellite carrier 31 along an axis A8 parallel or substantially parallel to the axis A3.
  • the planet carrier 31 preferably constitutes the motion input of the planetary gear train.
  • the second sun gear 34 preferably constitutes the motion output of the planetary gear train.
  • the epicyclic gear train is preferably of type 4, namely that the first sun gear comprises external toothing and the second sun gear comprises external toothing.
  • the satellite 32 may include a first return 32a meshing directly with the first sun gear 33 and a second return gear 32b meshing directly with the second sun gear.
  • the satellite carrier consists of a toothed wheel comprising a board on which the satellite is pivoted.
  • the first and second sun gears are arranged on either side on the other side of the planet carrier, in particular of the plate of the toothed wheel constituting the planet carrier.
  • the references 32a and 32b are arranged on either side of the satellite carrier.
  • Pinion 33a of first sun gear 33 is fixed relative to first and second frame members 80, 81.
  • the first sun gear is fixed to the frame whatever the state (engaged, disengaged) of the clutch device, that is to say whatever the state (stopped, moving) of count chain.
  • the second sun gear 34 is pivoted relative to the first and second frame members 80, 81.
  • the planetary carrier 31 is, for its part, pivoted around the second planetary gear 34.
  • the mobile 30 for counting the hours thus comprises a planetary carrier 31, as well as a second planetary gear 34, the planetary carrier and the second planetary gear being mobile in rotation relative to each other.
  • the second sun gear 34 is arranged so as to drive by gearing, directly or indirectly, the hour counter 40, in particular an hour counter performing one revolution per 24 hours.
  • the second sun gear 34 is arranged so as to drive, by gearing, the hour counter 40 directly.
  • the hour counter could be driven, by gear, by the second sun gear, via an intermediate element such as a transmission.
  • the counting chain is kinematically connected to a going train 90 of a watch movement by means of a clutch device comprising a mobile 10 clutch.
  • This mobile clutch 10 pivots around an axis A1. It notably comprises a clutch pinion 11 meshing with the going train and a retractable drive finger 12 provided to drive the counting chain 100 according to the state of the chronograph.
  • the clutch mobile 10 therefore makes it possible to mechanically link the going train 90 to the counting chain 100.
  • the clutch wheel set 10 is in the form of a vertical clutch wheel set.
  • vertical clutch mobile is meant a mobile clutch comprising a first element and a second element mobile in rotation around the axis A1 and moving relative to each other by translation along the axis A1 to switch from an engaged state to a disengaged state.
  • the clutch mobile 10 makes it possible to kinematically link the going train 90 to the chronograph counting chain depending on its configuration, the latter possibly having two distinct states, engaged or disengaged depending on the state of the chronograph, whether it is respectively running or stopped.
  • the drive finger 12 drives the chronograph counter chain one step per minute. More particularly, the drive finger 12 actuates the wheel 20a of the wheel set 20 for driving, which causes the return 50 of the wheel set for counting the minutes, as well as the wheel 60a of the counter 60 for the minutes.
  • the wheel set 20 In its rotation, the wheel set 20 also drives the wheel set 30 for counting the hours.
  • the mobile 20 In the embodiment shown in the figure 1 , 2 and 3 , the mobile 20 is arranged so as to drive, by gearing, the satellite carrier 31 directly.
  • axis A8 parallel or substantially parallel to axis A3.
  • satellite carrier 31 could be driven, by gear, by the mobile 20, via an intermediate element such as a reference.
  • Mobile 30 is illustrated in section in FIG. 6 and exploded in figure 7 .
  • the first transmission 32a of the satellite 32 meshes with the pinion 33a of the first sun gear 33 on a first level P1 or at the level of a first plane P1.
  • the second reference 32b of the satellite 32 is integral in rotation with the first reference 32a.
  • the second transmission 32b is arranged on a second level P2 or at the level of a second plane P2 and meshes with the wheel 34a of the second sun gear 34.
  • the pinion 34b integral in rotation with the wheel 34a, then drives the wheel 40a of the counter 40 hours.
  • the second sun gear 34 is for example pivoted by stones arranged along the axis A3.
  • the first stone 33b is mounted in the first sun gear 33 fixed to the first frame element 80.
  • the second stone 81a is fixed to the second frame element 81.
  • the planet carrier meanwhile, pivots around a portion of the second sun gear 34 , more particularly around a portion of the pinion 34b of the second sun gear 34.
  • the satellite 32 pivots along the axis A8 preferably in a stone 31b fixed to the planet carrier 31.
  • the entire counting chain, more particularly the minute counter 60 and the hour counter 40 are indexed by a single indexing device 70.
  • This indexing device 70 comprises for example a lever 71 intended to cooperate with the gearing of the return 50 included in the chain kinematically linking the 60 minute counter and the 40 hour counter.
  • the return of the lever 71 is provided by an elastic return element 72, one of which first end is fixed on the lever 71 and a second end is provided to cooperate with the first frame element 80 of the movement.
  • the hour counting mobile 30, which is in the form of a portion of an epicyclic gear train, advantageously makes it possible to generate a greater reduction ratio in the chronograph counting chain, thus making it possible to obtain, for example, a display counter 40 hours over 24 hours instead of 12 hours.
  • the size resulting from the arrangement of this planetary gear train remains identical or substantially identical to that of a mobile comprising a single and unique axis of rotation with a pinion and a wheel as described below with reference to the figure 4 and 5 .
  • the counting chain differs from the first embodiment of the counting chain only in that the mobile 30 pivoted around the axis A3 is replaced by a mobile 30' for counting the hours comprising only a wheel 31a' and a pinion 34b '.
  • Wheel 31a' and pinion 34b' are integral with each other. Wheel 31a' meshes with wheel set 20, in particular with pinion 20b of wheel set 20. Pinion 34b' meshes with counter 40, in particular with wheel 40a of counter 40.
  • the second counter chain embodiment can also differ from the first counter chain embodiment in that the first sun gear 33 is replaced by a core 33'.
  • the pinion 33a of the first sun gear 33 fixed to the first frame element 80 of the watch movement having no further use here, it can be replaced by a core 33a' also fixed to the first frame element 80 of the watch movement.
  • the space required for the implementation of the two variants 30 and 30' of hour counting mobile is identical or substantially identical. It is thus possible to obtain a common counter chain architecture which can, for example, present a display of the hour counter over 12 hours without an epicyclic train and, for example, a display of the hour counter over 24 hours by simply replacing the mobile 30' by mobile 30 and core 33a' by pinion 33a.
  • the sun gear 33 in particular the first stone 33b mounted in the first sun gear 33, can allow both the pivoting of the mobile 30 and of the mobile 30'.
  • the first stone 33b can be added directly to the first frame element 80.
  • the invention also relates to a method of mounting a mechanism or a timepiece, an embodiment of which is described below with reference to the figures.
  • the step of mounting the mobile 30' can comprise the mounting of the core 33' in which the mobile is pivoted.
  • the step of mounting the wheel set 30' may include mounting the first sun gear 33 in which the wheel set 30' is pivoted.
  • the step of mounting the planetary gear set 31, 32, 33, 34 may include fixing to the frame the first sun gear 33 of the planetary gear set.
  • the planetary gear train solution described above comprises a first sun gear fixed to the frame of the watch movement. This solution could work in a similar way if the fixed part of the epicyclic gear train to the frame were the second sun gear.
  • the planetary gear could also be driven by one of the sun gears instead of being driven by the planet carrier.
  • the construction of the planetary gear train could be different.
  • the planetary gear train could include internal toothing, for example on at least one of the planet gears and/or the planet carrier.
  • the planetary gear train could also be of the spherical type with, for example, conical teeth on the sun gears and/or the satellite(s).
  • the axis or axes of rotation of the satellite(s) would then be perpendicular or substantially perpendicular to the axis A3 of the planetary gear train.
  • the epicyclic gear train could be of the differential type with balls and operate by friction by replacing the planet gear(s) of the planet carrier with ball bearings.
  • the planetary gear train could also comprise several satellites arranged along different axes. These satellites could be mounted between the two sun gears in parallel and/or in series.
  • the counting chain can advance by one step every minute under the action of a drive finger of a clutch device.
  • the driving of the counting chain could also be done continuously, without jumping, in a trailing or semi-trailing manner.
  • the clutch wheel assembly is mounted in parallel with respect to the finishing line.
  • the chronograph clutch mobile could be arranged directly in the going train chain linking the barrel to the regulating organ.
  • the clutch device comprises a vertical clutch mobile.
  • the clutch device could also take other forms such as, for example, a horizontal clutch device or an oscillating pinion.
  • the chain of Chronograph counting could also be linked directly to the barrel, for example.
  • the clutch device could then take the form of a friction device.
  • the wheel 31a of the satellite carrier comprises the same number of teeth as the wheel 31a' of the wheel set for counting the hours.
  • the pinion 34b of the second sun gear has the same number of teeth as the pinion 34b' of the hour count wheel set.
  • the count string is an hour count string.
  • the planetary gear type reducer could be used in any other counting chain comprising, for example, a seconds counter, a minutes counter, or a countdown chain.
  • two integral elements it is meant that these two elements are fixed to one another. In other words, it is meant that there is an embedding link or a complete link between them.
  • an epicyclic gear train is advantageously arranged in a counting chain. It makes it possible to obtain a "24-hour” chronograph display instead of the "12-hour” display, with a particularly simple and space-saving solution, so much so that it is possible to simply replace one of the the chronograph counting chain, as well as possibly a core, by this planetary train to pass from a “12 hour” display to a “24 hour” display.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Measurement Of Unknown Time Intervals (AREA)
EP20186888.2A 2020-07-21 2020-07-21 Uhrwerkmechanismus mit zählkette Pending EP3944026A1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP20186888.2A EP3944026A1 (de) 2020-07-21 2020-07-21 Uhrwerkmechanismus mit zählkette
JP2021118441A JP2022021328A (ja) 2020-07-21 2021-07-19 計数連鎖を有する時計機構
US17/378,885 US20220026851A1 (en) 2020-07-21 2021-07-19 Horological mechanism with counting chain
CN202110822690.9A CN113960910A (zh) 2020-07-21 2021-07-21 带有计数链的钟表机构

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20186888.2A EP3944026A1 (de) 2020-07-21 2020-07-21 Uhrwerkmechanismus mit zählkette

Publications (1)

Publication Number Publication Date
EP3944026A1 true EP3944026A1 (de) 2022-01-26

Family

ID=71738042

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20186888.2A Pending EP3944026A1 (de) 2020-07-21 2020-07-21 Uhrwerkmechanismus mit zählkette

Country Status (4)

Country Link
US (1) US20220026851A1 (de)
EP (1) EP3944026A1 (de)
JP (1) JP2022021328A (de)
CN (1) CN113960910A (de)

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2066357A (en) * 1934-11-12 1937-01-05 George R Mcdonald Manual or automatic means for correcting time-keeping mechanisms
FR815777A (fr) * 1936-12-31 1937-07-22 Cie Ind De Mecanique Horlogere Mécanisme d'horlogerie
US2325539A (en) * 1939-08-22 1943-07-27 Firm Soc Ind De Soneeboz Sa Timepiece with chronograph
FR2358695A1 (fr) * 1976-07-12 1978-02-10 Suisse Horlogerie Mouvement de piece d'horlogerie
DE2744891A1 (de) * 1976-10-13 1978-04-20 Landis & Gyr Ag Elektrische uhr mit synchronmotorantrieb und untersetzungsgetriebe
EP0195742A1 (de) 1985-03-05 1986-09-24 Ulysse Nardin S.A. Astronomische Uhr
EP0772104A1 (de) 1995-10-31 1997-05-07 Montres Rolex Sa Uhr mit Chronographmechanismus
US5798986A (en) * 1996-10-28 1998-08-25 Industrial Technology Research Institute Alarm mechanism system
CH698906A2 (fr) * 2008-05-21 2009-11-30 Christophe Claret Sa Chronographe.
EP2515186A1 (de) 2011-04-20 2012-10-24 Cartier Création Studio S.A. Räderwerk für Uhr
CN108037653A (zh) * 2018-01-15 2018-05-15 烟台持久钟表有限公司 一种钟表机芯
EP3368950A1 (de) 2015-10-27 2018-09-05 Manufacture et fabrique de montres et chronomètres, Ulysse Nardin Le Locle S.A. Chronograph mit rückwärtszähler

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH709162B1 (fr) * 2014-01-20 2017-11-30 De Bethune Sa Dispositif d'embrayage pour mouvement horloger.
CH710362A1 (fr) * 2014-11-13 2016-05-13 Société Anonyme De La Mft D'horlogerie Audemars Piguet & Cie Dispositif de rattrapante à train épicycloïdale pour pièce d'horlogerie.
EP3059642B1 (de) * 2015-02-23 2019-05-22 Montres Breguet S.A. Uhrmechanismus
EP3316048B1 (de) * 2016-10-28 2020-03-18 Rolex Sa Anzeige- und korrekturmechanismus des zustands von einer pluralität von informationen
JP6847758B2 (ja) * 2017-05-09 2021-03-24 セイコーインスツル株式会社 ムーブメント及び時計

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2066357A (en) * 1934-11-12 1937-01-05 George R Mcdonald Manual or automatic means for correcting time-keeping mechanisms
FR815777A (fr) * 1936-12-31 1937-07-22 Cie Ind De Mecanique Horlogere Mécanisme d'horlogerie
US2325539A (en) * 1939-08-22 1943-07-27 Firm Soc Ind De Soneeboz Sa Timepiece with chronograph
FR2358695A1 (fr) * 1976-07-12 1978-02-10 Suisse Horlogerie Mouvement de piece d'horlogerie
DE2744891A1 (de) * 1976-10-13 1978-04-20 Landis & Gyr Ag Elektrische uhr mit synchronmotorantrieb und untersetzungsgetriebe
EP0195742A1 (de) 1985-03-05 1986-09-24 Ulysse Nardin S.A. Astronomische Uhr
EP0772104A1 (de) 1995-10-31 1997-05-07 Montres Rolex Sa Uhr mit Chronographmechanismus
US5798986A (en) * 1996-10-28 1998-08-25 Industrial Technology Research Institute Alarm mechanism system
CH698906A2 (fr) * 2008-05-21 2009-11-30 Christophe Claret Sa Chronographe.
EP2515186A1 (de) 2011-04-20 2012-10-24 Cartier Création Studio S.A. Räderwerk für Uhr
EP3368950A1 (de) 2015-10-27 2018-09-05 Manufacture et fabrique de montres et chronomètres, Ulysse Nardin Le Locle S.A. Chronograph mit rückwärtszähler
CN108037653A (zh) * 2018-01-15 2018-05-15 烟台持久钟表有限公司 一种钟表机芯

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Publication number Publication date
US20220026851A1 (en) 2022-01-27
CN113960910A (zh) 2022-01-21
JP2022021328A (ja) 2022-02-02

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