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Landeron 21
Last updated: July 26, 2025
Brand
Caliber Number
21
Production Period
1925
Lignes
16”’
Diameter
36.1 mm
Height
7.0 mm (Est.)
Power Reserve
Unconfirmed
Frequency
18,000 bph (2.5 Hz)
Jewels
17
Escapement
Swiss Lever Escapement
Anti-Shock Device
None (typical for the era)
Hand Count
4
Manufacture Region
Unconfirmed
Functions
Manual Winding, Mono-pusher Column-Wheel Chronograph (30-min)
Landeron 21 Description
The Landeron 21 is a very early and large (16 Ligne) manually wound chronograph movement from around 1925. Unlike the cam-lever system Landeron later became famous for, the Cal. 21 is a traditional column-wheel chronograph. It is also a mono-pusher, with a single button used to cycle through the start, stop, and reset functions. This caliber represents an important and high-quality early chapter for the famed chronograph maker.
