35,000 CHF
TAVERNIER – IMPORTANT PORTABLE MARINE TIMEKEEPER Jean-Pierre Tavernier (Paris). Made for navigational use, circa 1770. Very fine, extremely rare and important, large, gilded-brass portable marine timekeeper with locking case and special case key, large diameter second-beating balance, cylinder escapement with large 60-toothed escape wheel for deadseconds with stop feature. Two-body, gilded brass, bassine with deep back, the movement can be locked into the case by means of a special bolt composed of a blued steel toothed rack sliding to lock the case activated by a key with pinion tip to mesh with the rack locking bolt, brass blocks inside the case secured by screws. White enamel, convex, radial Roman numerals, outer minute divisions with Arabic five-minute numerals, subsidiary dead-seconds with Arabic five-second numerals, winding aperture at 3 o’clock. Fine blued steel beetle and poker hands. 63 mm., matte gilt, cylindrical pillars with flared ends, fusee and chain with Harrison’s maintaining power, steel stopwork on the dial plate, cylinder escapement with 60-toothed brass escape wheel, the upper pivot jeweled, steel cylinder, the escape wheel pinion parallel mounted with another toothed wheel approximately 5 mm below the escape wheel, this wheel is for the stop feature and acted upon by a steel lever connected via a pivoted blued steel arm on the dial plate to the lever under the bezel, large diameter second-beating steel three-arm balance with jeweled pivots, flat bal
Auctioneer:
Antiquorum
Date:
2013-03-17
