|Diameter:||31.80 mm (14 ligne)|
|Complications:||2-Button, Cam Switching Chronograph, Chronograph, Date, Date by Pointer, Day, Horizontal Clutch Chronograph, Month|
|Hands:||30 Minute Chronograph Hand at 3:00, Central 60 Second Chronograph Hand, Central Hour Hand, Central Minute Hand, Date Pointer at 6:00, Day Window at 11:30, Month Window at 12:30, Small Seconds Hand at 9:00|
|Distinguishing Technical Characteristics|
Clockwise Balance Cock
Cal. 57 is a cam-switching chronograph movement produced by Hahn & Cie. of Landeron in the 1950s. It was based on Cal. 51 as part of the large Cal. 48 family, and features a full calendar like the similar Cal. 59 but is slightly larger at 14 ligne.
Images are taken from official publications and are used here for commentary and educational purposes. Copyright is held by the original owner as noted.
Adjustment of the calendar is handled by pushers in the case:
- 1:30 – Month
- 4:30 – Date
- 10:30 – Day