|Diameter:||31.8 mm (14 ligne)|
|Cal. 54||Complications:||2-Button, Cam Switching Chronograph, Chronograph, Horizontal Clutch 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. 54 is a 14 ligne variant of the 13.75 ligne Cal. 48 an early dual-pusher cam-operated chronograph movement. The added width was modest (less than 1 mm). Unlike other movements in the family it uses traditional horizontal clutch rather than an oscillating pinion to activate the chronograph function.Images are taken from official publications and are used here for commentary and educational purposes. Copyright is held by the original owner as noted.