Important Collectors Wristwatches, P...
Geneva, Hotel Des Bergues, Oct 20, 1991
LOT 41
Anonymous, Swiss or French?
CHF 2,500 - 3,000
Sold: CHF 8,050
Very rare three quarter plate movement with fusee, unusual alternate impulse pivoted detent escapement .The 'scape wheel has two sets of teeth, those of longer radius serving for locking and those of shorter, for impulse; therefore, the balance makes a complete oscillation every half second, and impulse is given every full second, allowing a dead beat seconds hand. Without dial. Ccamb. p. 213-214, O.T.L. No 33,
