Patent classifications
G
PHYSICS
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G04
HOROLOGY
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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
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19/00
Indicating the time by visual means
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G04B19/28
Adjustable guide marks or pointers for indicating determined points of time
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G04B19/283
on rotatable rings, i.e. bezel
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G04B19/286
with locking means to prevent undesired rotations in both directions
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