A sensational and extremely well preserved 1940s Gallet Multichron "Clamshell", the first waterproof chronograph, with a beautiful patinated silver multi-scale dial featuring snail telemetry scale and outer tachometer scale, and a broad unpolished and patented two piece 34.5mm screwback case, the feature that yielded this watch its nickname, powered by a manually wound Venus caliber, running well and keeping accurate time.

Dimensions: 34.5mm

Box, Papers, etc.: Watch only

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