Important Collectors Wristwatches Po...
Geneva, Hotel Des Bergues, Apr 22, 1995
Johann Koch, Cal en (Berlin), circa 1640. Rare and important silver alarm and calendar watch made in Côllen before it merged with Berlin.
C. Massive, bassine, entirely pierced chased and engraved with a floral decoration. Elaborate hinge for the lid. D. Silver champlevé chapter ring with Roman numerals, inner silver revolving alarm setting dise with Arabic numerals, engraved with a floral decoration matching that of the case. External ring for the day of the month, operated manually. Blued steel single hand and pointer. M. Hinged gilt brass with urn pillars, fusee with chain, verge escapement, twoamn steel balance without spring, gilt brass irregular aval cock pierced and engraved with a free composition of flowers, secured by a screw. Worm and wheel set-up with silver rosette and blued steel brackets. Alarm train with gilt brass fixed barrel pierced and engraved with flowers, and cock of an elaborate design for the second wheel, striking on a bell. Signed on the back plate. In very good condition. Diam. 50 mm.