Landeron caliber 50 is Swiss movement from 1930s.
Functions: 2 registers on the dial – 60 seconds, 30 or 45 minutes , sub second
Manual-winding movement with 17 jewels.
F = 18000 A/h
Power reserve: 42 hours
Diameter: 31.0 mm
Chronograph movement from -30’s, base caliber Landeron: 48 (13.75”’). Made in large batches with different calibers and sizes, mainly differences in the chronograph mechanism between the different calibers. Later with more modern ring balance and shock-protection, production was halted in the 70’s.
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Landeron caliber 50 watch parts
