Vacheron Constantin with spring-detent escapement

very rare and fine Vacheron Constantin marine chronometer
with spring-detent escapement and up-and-down indicator
around 1915

three-part mahogany case with brass corners
cardanic suspended, gilded brass bowl
silver-plated dial
spade-form-hands steel blued

Another of these extremely rare Vacheron Constantin marine chronometers was sold at Phillips Geneva on May 10, 2026, for 190,500 Swiss francs.