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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
G04B21/00—Indicating the time by acoustic means
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FR437273D1910-12-091911-12-07
Improvements to the striking mechanism of clocks, clocks, watches and other horological instruments
ExpiredFR437273A
(en)
Complementary time dial instantly adapting to the ordinary dials of watches, clocks and clocks with only the hour number 1 to 12, in order to add the new number 13 to 24