18k white gold Wrist Chronometer no. 6025

Case: s/n; 10399, 18k white gold, jump hour, min, sec, Case; Niton Switzerland Dial: silvered dial, unsigned, jumping hour aperture, minute disk and subdial seconds. Movement: s/n; 6025, 10''' tonneau, 18 jewels, 8 adj, Geneva seal. The movement obtained the Poincon de Geneve quality seals on September 13, 1929 and was part of a batch of 6 (6024-6029). Provenance: 1929 - Niton, Geneve Watch maker in the USA