GB612083A
(https= )
US2006485A
(en )
1935-07-02
Calendar
GB368046A
(https= )
GB339571A
(https= )
GB190003842A
(en )
1900-04-28
Improvements in Calendars and Date Calculators.
US1600874A
(en )
1926-09-21
Calendar
GB358026A
(https= )
GB698886A
(https= )
US788746A
(en )
1905-05-02
Calendar.
GB609421A
(https= )
GB190409526A
(en )
1905-02-23
Improvements in Perpetual Calendars
GB571544A
(https= )
US2154013A
(en )
1939-04-11
Perpetual calendar
GB190603739A
(en )
1906-05-03
Improvements in Perpetual Calendars.
CN2591698Y
(zh )
2003-12-10
万年星期速查盘
JP1728815S
(ja )
2022-11-01
カレンダー
US1377429A
(en )
1921-05-10
Calehdab
GB137913A
(https= )
JP6664041B1
(ja )
2020-03-13
四柱推命六十干支求め両面回転盤
GB647913A
(https= )
US968255A
(en )
1910-08-23
Clock-dial.
GB364840A
(https= )
GB620059A
(https= )
GB740926A
(https= )
1900-01-01
GB716014A
(en )
1954-09-22
Revolving disc and pointer perpetual calendar