Valjoux 55 VBR
Last updated: July 28, 2025

Brand
Caliber Number
55 VBR
Production Period
1950s – 1960s
Lignes
15.5”’
Diameter
35.0 mm
Height
8.0 mm
Power Reserve
Unconfirmed
Frequency
18,000 A/h (2.5 Hz)
Jewels
17
Escapement
Swiss Lever
Anti-Shock Device
Incabloc
Hand Count
4+ (Hour, Minute, Central Flyback Second, Minute Counter, Countdown Indicator)
Manufacture Region
Unconfirmed
Functions
Flyback chronograph, Bezel-set countdown timer, 15 or 30-minute counter
Valjoux 55 VBR Description
The Valjoux 55 VBR is a very rare and complex manual-wind, column-wheel flyback chronograph. The “VBR” indicates a special “bi-complication” used in military aviation watches, primarily for the French military in the 1950s/60s. The movement features a unique countdown timer that is preset via a rotating bezel. This allowed pilots to perform timed procedures, like bombing runs, with a clear visual countdown on the dial, a highly specialized function for its time.