Important Watches, Wristwatches and C...
Geneva, Hotel Des Bergues, Apr 12, 1997
Brosse a Bordeaux, Invenit et Fecit 1817. Fine and almost certainly unique marine chronometer with extraordinary constant force escapement.
C. Double body mahogany box with slide on the lid over the observation aperture. Brass gimbal with laded bowl and special locking device to secure it in the horizontal position. D. Silvered with Roman numerals and subsidiary seconds. Blued steel Breguet hands. M. Brass three-quarter plate with cylindrical pillars secured by screws, going barrel, highly unusual "hammer and nail" type, triple detent constant force escapement with locking wheel on the back plate border, three-arm compensation balance, free sprung blued steel helical balance spring. Signed on the dial. In very good condition but needs to be overhauled. Dial diam. 80 mm. Dim. 13 x 16 x 16 cm.