12,650 CHF
B. Robert Mairet et William Du Bois, Locle ( Switzerland) No. 122 - J. Davis, London, Swiss, made for the English market, circa 1850. Fine small 49 hour going, marine chronometer, with visible escapement. Two part solid mahogany box with slIding observationlid, brass bowl and circular gimballed suspension. Silvered with Roman numerals, subsidiary seconds and Up-and-Down scale. Blued steel Breguet hands. Frosted and giltrass full plate with cylindrical pillars secured by screws, fusee with maintaining power, Earnshaw type spring detent escapement set on the back plate, two armed bimetallic compensation balance with cylindrical weights and timing screws. Free sprung blued steel helical balance spring with terminal curves. In very good condition. Dial diam. 70 mm. Dim. 14.5x14.5x14 cm. Notes The ebauche is marked: "WDB", the Robert -Mairet signature is marked on the inner face of the back plate. Davis signature on the dial.
Auctioneer:
Antiquorum
Date:
1992-10-17
