The Longitude at the Eve of the Third...

Geneva, Hotel Des Bergues, Oct 23, 1999

LOT 65

L. Leroy & Cie., Paris, Chronostat No. 1, circa 1955.Very fine mahogany prototype of the Chronostat.

C. Three body deck-watch type mahogany box. Cylindrical brass bowl with screwed bezel. D. Silvered with Arabic numerals and subsidiary seconds. Blued steel "spade" hands. M. Brass, marble finished, electrically powered, Sully type "shaft cutting" frictional rest escapement with vertical escape wheel and double pallet on the balance staff, "Integral" Guillaume balance, free sprung blued steel helical balance spring with terminal curves.Signed on the dial.Dial diam. 70 mm.