• CHF4 000 - 6 000
• CHF 4 370

D. White enamel with Roman numerals and outer Arabic minute ring (slightly restored and with hair lines). M. Gilt brass full plate with conical pillars, going-barrel passing through the back plate and secured by a gilt brass bridge engraved with a formai decoration. Original Robin detent-lever escapement, plain brass three-arm balance, flat balance spring, gilt brass small cock with single foot only, with engraved decoration and polished steel end-piece. Signed on the dial, the back plate engraved : Echappement de Robin, Invenit 1791. h1 good condition. Diam. 50 mm.