L\'ART DE L\'HORLOGERIE EN FRANCE DE ...
Geneva, Hotel Des Bergues, Nov 14, 1993
Berthoud Frères, No. 216, circa 1818. Rare and important marine chronometer, made in Louis Berthoud's workshop, after his death.
C. Double body mahogany box. Brass gimbal with a lead-weighted brass bowl lined with velvet. Brass case en roma' de tabatière, mounted in the gimballed bowl with a screwed glazed cover. D. Silvered regulator type, with small Roman chapter for hours, subsidiary seconds below, outer Arabic minute ring on the border of the bezel and small 24 hour up-and-down sector at "10". Bluedsteel Breguet hands. M. Brass full plate,delicate sun-burst pattern stone finished, with steel conical pillars secured by ruts with washers. Fusee with chain, maintaining power, fully jewelled, pivoted detent escapement, two-arm compensation balance, with poising and timing screws, bluedsteel helical balance spring with terminal curves. Signed on the dial and the back plate. In very good condition. Dial diam. 80 mm. Dim. 150 x 150 x 150 mm.