L. Leroy & Cie., Horlogers de la Marine, 7 Boulevard de la Madeleine, Paris, No. 2769/70078, cir ca 1912. Fine 18K gold keyless pocket lever chronometer, Bulletin de Premiere classe de l'Observatoire National de Besancon, No. 9288, in 1913, with a total of 142.2 marks, in original fitted leather box. | Important Watches, Wristwatches and Clocks | Hong Kong, Hotel Furama Kempinski, 9th June 1997

Important Watches, Wristwatches and C...

Hong Kong, Hotel Furama Kempinski, Jun 09, 1997

LOT 362

L. Leroy & Cie., Horlogers de la Marine, 7 Boulevard de la Madeleine, Paris, No. 2769/70078, cir ca 1912. Fine 18K gold keyless pocket lever chronometer, Bulletin de Premiere classe de l'Observatoire National de Besancon, No. 9288, in 1913, with a total of 142.2 marks, in original fitted leather box.

HKD 13,000 - 17,000

USD 1,700 - 2,200

Sold: HKD 13,800

C. Three body, massive, "bassine", polished. Hinged gold cuvettc. 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 certificates. Diam. 51 mm.

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Notes

Timing Contest: - Mean average daily rate = 3,54 - Error of compensation at 20° = 0,139 - Mean error in 2 positions - 3,21 - Restart period ± 0,74 The punch mark in form of a viper's head is set by the Observatory of Besancon on watches successful at the contest and awarding the Bulletin de Premiere classe.