Vacheron & Constantin, Genève, No. 392852, case No. 245071, cornpleted in June 1921, sold on 29 May 1923, to Mr. E.E. Robert, New York. Fine 18 ct. pink gold keyless watch with split seconds chronograph and 30 minute instantaneous recorder. Three body, massive, "demi-bassine" polished. Gold cuvette. Mat silverl with Breguet numerals, outer Arabic minute and chronograph ring, sunk subsidiary seconds and minute register. Blued steel Berguet hands. 17-, rhodium plated, 26 jewels, straight fine lever escapement, cut bimetallic balance, eight adjustments, Breguet balance spring with a swan-neck micrometric index. Chronograph with visible work and push-piece on the winding crown, spplit seconds push piece in the band. Signed on the dial, case and movement. In very good condition. Diam. 46 mm. Notes A similar watch is illustrated in l'Univers de Vacheron Constantin, Genève, p. 402.