Rotatable crystal and bezel assembly for achieving special...

Details Rotatable crystal and bezel assembly for achieving special... Rotatable crystal and bezel assembly for achieving special...

G - Physics

04

B

41/17, 58/22, 58

G04B 39/00 (2006.01)

Patent

CA 1080488

Abstract of the Disclosure In a timepiece, a supplementary watch crystal is mounter over the regular watch crystal so as to be manually rotatable with respect to the regular watch crystal. The supplementary watch crystal may then be provided with special marking indicia or constructed of special material to achieve special visual effects when used in conjunction with other devices in a timepiece such as a rotatable bezel ring or rotatable "seconds" disc with marking thereon. Modified forms of the invention include a bezel extension formed on the supplementary crystal, or a second supplementary crystal mounted on the first supplementary crystal. The supplementary crystal is preferably mounted by an inner circumferential lip on the supplementary crystal disposed in an outer circumferential groove in the regular watch crystal.

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