FRÉDÉRIC LOUIS FAVRE-BULLE, LOCLE. AN EXCEPTIONAL AND RARE YELLOW GOLD POCKET CHRONOMETER SPRING DETENT AND SPHERICAL GOLD BALANCE SPRING, ONE MINUTE TOURBILLON REGULATOR AND THERMOMETER CIRCA 1820

2
3
4
2
3
4
Lot №: 87299
Not sold
15 May 2012

Description

• gilt three quarter plate movement, the back plate secured by three screws, fusee with maintaining power, 11 jewels, gold wheel train with spring detent escapement, two-arm compensation balance with wedge-shaped weights and timing screws, free-sprung spherical balance spring, one-minute tourbillon with polished steel semi-circular carriage fitted with a platinum weight • gold cuvette with winding hole • white enamel dial, Roman numerals, subsidiary dial for direct-drive seconds, fan-form aperture for Réaumur thermometer scale • engine-turned case with concentric circles to the back
diameter 60 mm