Important Wristwatches, Watches & Clocks
Geneva, Hotel Des Bergues, Oct 17, 1992
Isaac Grasset & Cie., Genève, circa 1910.
Rare gun- metal, keyless watch without mainspring barrel, Swiss patent No. 5019 and 14528, in original fitted box. Double body demi-bassine, case. Glazed cuvette. White enamel dial with Arabic numerals and subsidiary seconds. GiIt brass movement, the mainspring rolled around the winding shaft. Straight line lever éscapement, cut bimetallic balance, Breguet balance spring. Diam. 53 mm.