The Longitude at the Eve of the Third...

Geneva, Hotel Des Bergues, Oct 23, 1999

LOT 27

Louis Berthoud, Horloger de la Marine, circa 1800.Very fine eight day going mahogany hour and half hour striking, centre seconds mantel regulator with special escapement.

C. Rectangular mahogany, glazed four sides with triangular pediment, flat columns on the face, surmounted by gilt bronze Egyptian figures. D. White enamel with Roman numerals and outer Arabic minutes and seconds rings. Blued steel Breguet hands. M. Brass circular with turned pillars secured by pins, going barrel on both the going and the striking trains, pin-wheel escapement à coups perdus, allowing to show the dead centre seconds with a half seconds beating pendulum. Half seconds gridiron penduum with knife edge suspension.Dim. 46 x 29 x 18 mm.