A 1940's Swiss/American Wittnauer 14k yellow gold wristwatch, the 2.2 x 2.8 cm rectangular 'tank' case with champagne dial, Arabic numerals indicate even hours and batons, subsidiary seconds at 6, the 17-jewel movement with makers name, the case marked 'Keystone', 'Wittnauer' and numbered 2141734. Apparently working. Provenance: Private Auckland estate collection.