Important Watches, Wristwatches and C...

Geneva, Hotel Des Bergues, Oct 12, 1996

LOT 331

L. Leroy & Cie., Horlogers de la Marine, 7 Boulevard de la Madeleine, Paris, No. 2769, case No. 9288, circa 1913. Fine 18K gold keyless pocket chronometer. Bulletin de Premiere classe de l'Observatoire National de Besancon awarded at the Timing Contest organised in 1913.

CHF 2,500 - 3,000

Sold: CHF 2,760

C. Three body, massive, "bassine", polished. Hinged gold cuvette. D. White enamel, with Arabic numerals, outer Arabic minute ring and sunk subsidiary seconds. Gold "spade" hands. M. 19"', gilt brass with punch-mark in form of a viper's head set by the Observatory of Besancon, 20 jewels, brass-invar Guillaume balance adjusted by Quelos, blued steel balance spring with terminal curve. Signed on the dial, case and movement. In very good condition with copies of the timing contest records and of the Bulletin. Diam. 51 mm.


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Notes

Timing Contest: - Mean average daily rate +/- 0,32 - Error of compensation at 20° +/- 0,136 - Mean error in 2 positions +/- 3,14