Important Watches, Wristwatches and C...
Geneva, Hotel Des Bergues, Oct 15, 1994
LOT 16
Hessen Invenit et Fecit in 1787. Extremely rare experimental watch with special escapement and temperature compensation, Inventée en 1787 par Hessen, Horloger de Monsieur P-F à Paris.
CHF 4,000 - 6,000
Sold: CHF 3,910
C. Later silver, glazed on both faces. D. White enamel with Roman numerals and subsidiary seconds (hair cracks). Blued steel Breguet hands. M. Inverted gilt brass full plate with polished steel back plate, fusee with chain, verge escapement, the verge driven by the balance by means of a roller with highly complicated safety device in order to enable the balance to be free when effecting its supplementary arc. Brass four-arm balance with poising screws, short helical balance spring with large bimetallic compensation curb screwed on the front plate. Signed on the dial and dial plate. In working order. Diam. 48 mm.
