|Diameter:||28.0 mm (12.5 ligne)|
|Complications:||2-Button, Big Date, Cam Switching Chronograph, Chronograph, Date, Double Wheel Big Date, Quick Date Correction|
|Hands:||30 Minute Chronograph Hand at 3:00, Big Date at 6:00, Central 60 Second Chronograph Hand, Central Hour Hand, Central Minute Hand, Small Seconds Hand at 9:00|
|Production: 1953 – 1963|
Cal. 211 was introduced in 1953 and retired around 1963.
The most unusual feature of Cal. 211 is the dual wheel “big date” shown at 6:00 on the dial. An early example of this complication, it counts to 39 days rather than 31, requiring correction at the end of every month using the inset pusher at 8:00.