|Diameter:||34.7 mm (15.5 ligne)|
|Complications:||2-Button, 7-Column Chronograph, Chronograph, Column Wheel Chronograph|
|Hands:||30 Minute Chronograph Hand at 3:00, Central 60 Second Chronograph Hand, Central Hour Hand, Central Minute Hand, Small Seconds Hand at 9:00|
|Distinguishing Technical Characteristics|
Clockwise Balance Cock
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.Images are taken from official publications and are used here for commentary and educational purposes. Copyright is held by the original owner as noted.