JACQUES SERMAND GENEVA. An antique firegilt and rock crystal crucifix pendant watch, c. 1630. Height: 72 mm. 

A gilt-brass and rock crystal, cruciform pendant watch, signed on the backplate J Sermand, c. 1630. The gilt-metal dial plate is engraved with a scene of Jesus carrying his cross. It has a silver dial ring with Roman numerals around an engraved centre depicting a village scene. The time is indicated by a single blued-steel hand. The movement has turned pillars connecting the plates, gut fusee and verge escapement. The backplate has a plain steel balance without balance spring under a pierced and engraved pinned-on cock. There is also a ratchet-type set-up regulator. • Height: 72 mm. • The maker, Jacques Sermand (1595-1651), was a master watchmaker in Geneva who made agate and rock crystal watches and watches in the shape of a cross, a tulip, a star or a skull. Watches by him are represented in the Louvre, The Metropolitan Museum, the British Museum and The Patek Philippe Museum.

 Source: http://www.artimobrussels.com