Valjoux 23

Last updated: July 28, 2025

Brand

Valjoux

Caliber Number

Production Period

1916 – 1974

Lignes

13”’

Diameter

29.5 mm

Height

5.85 mm

Power Reserve

Unconfirmed

Frequency

18,000 A/h (2.5 Hz)

Jewels

Escapement

Swiss Lever

Anti-Shock Device

Variable (Incabloc common in later versions)

Hand Count

5 (Hour, Minute, Central Chronograph Second, 2x Sub-dial hands)

Manufacture Region

Unconfirmed

Functions

Chronograph with 30 or 45-minute counter, Small Seconds

Valjoux 23 Description

The Valjoux 23 is one of the most revered manual-wind, column-wheel chronograph movements ever made. Produced for nearly 60 years, it was celebrated for its reliability, smooth operation, and classic bi-compax (two-register) layout. It was the movement of choice for a vast array of high-end brands like Patek Philippe, Audemars Piguet, and Heuer. It is the direct architectural predecessor to the famous three-register Valjoux 72.