Cal. 3 is a 15.5 ligne (34.7 mm) column wheel chronograph movement produced by Landeron in the 1930s. Unlike the similar monopusher Cal. 2, Cal. 3 is a two-pusher design.
Landeron 3
Cal. 3 is a 15.5 ligne (34.7 mm) column wheel chronograph movement produced by Landeron in the 1930s. Unlike the similar monopusher Cal. 2, Cal. 3 is a two-pusher design.