Lot 496

Dome "Doublematic Bidynator", Cal. F693 (Felsa 693 Bidynator), 37 mm, circa 1960
A vintage automatic wristwatch in near mint condition, with full calendar and moon phase
Case: 18k rose gold, screw back. Dial: two-tone silvered.
The Felsa Bidynator automatic movement represents a milestone in the evolution of automatic wristwatches. Felsa SA was founded in Grenchen in 1918; in 1928 it was merged into the "Ebauche SA", before eventually merging with the ébauche factory "A. Michel" in 1940. In 1942 the company launched their first automatic caliber with a bi-directional rotor, which they called "Bidynator". For calibre 693 - the most complicated movement Felsa ever created - the calendar with day of the week and month is displayed in two small windows on the dial, which also has an arched cutout for the moon phase. The date sits near the outer edge. The calendar functions can be operated through individual, sunken pushbuttons in the rim of the case.
Source: https://watch-wiki.org/index.php?title=Felsa, as 0f 07/10/2018

Sold