UNSIGNED

UNSIGNED, FRANCE, THE SAUTROG ESCAPEMENT, SMALL POCKET WATCH WITH EXPERIMENTAL CYLINDER ESCAPEMENT, 18K YELLOW GOLD A very fine, rare and small, 18k gold, manual wind open face, key-winding pocket watch with a special cylinder escapement, white enamel dial, blue steel Breguet hands. Brand: Unsigned, France Model: THE SAUTROG ESCAPEMENT Year: Circa 1770 Caliber: 20 mm., two-bridge calibre, fully engraved, with Sautrog escapement. Diameter: 26 mm. Weight: 16 gr. Accesories: Accompanied by the original box, small gold chain and gold watch key. Grading System: AAA (Excellent) Case: 3 (Good) Dial: 3-71-01 (Good , Hairlines , HANDS Original) Movement: 3-6* (Good , Slightly oxidized , Overhaul recommended, at buyer's expense) HKD: 35,300 - 71,000 USD: 4,500 - 9,000 EUR: 4,000 - 8,000 JPY: 720,000 - 1,430,000 To be sold without reserve The Sautrog escapement is illustrated in J. A. Lepaute’s ''Traité d’Horlogerie'', published in Paris in 1767, Planche XIII, Fig. 3. An extremely rare escapement. The Sautrog escapement is a rare and early form of cylinder escapement, generally regarded as a precursor to the developed cylinder escapement. It is traditionally associated with Thomas Tompion, who is credited with having developed this form of escapement around 1695, before George Graham subsequently improved the construction around 1720–1725. The term “Sautrog”, literally referring to a trough-shaped recess, relates to the characteristic construction of the balance staff.

估價:$4,588.51

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