18k yellow gold Wrist Chronometer no. 5232
Case: Ladies, 18k yellow gold, rectangular, signed case back inside; Niton for J.E. Caldwell & Co
Dial: Jump hour, revolving minute disc, unsigned. Officially it is a wandering hour wristwatch.
Movement: Oval, nickel, bi-metallic balance with blued steel balance spring with Breguet overcoil with polished steel kidney piece, signed "5232, Eighteen 18 Jewels, All Adj, Niton, Geneve, Swiss", stamped with the Geneva seal. The movement measures 22.75 length x 12.5 width x 3.33 depth. Obtained the Poincon de Geneve quality seals on January 5, 1929 and was part of a batch of 6 (5231-5236). Same date another batch obtained the Poincon de Geneve quality seals (5639-5644).
1929 - Niton, Geneve
1929 - J.E. Caldwell & Co.
2010 - Ebay, Private collector in Japan
2010 - chronomania.net
A similar watch is depicted in this database and is referred to as Vacheron & Constantin.