|Diameter:||27.80 mm (12 ligne)|
|Complications:||2-Button, 8-Column Chronograph, Chronograph, Column Wheel Chronograph|
|Hands:||12 Hour Chronograph Hand at 6:00, 30 Minute Chronograph Hand at 3:00, Central 60 Second Chronograph Hand, Central Hour Hand, Central Minute Hand, Small Seconds Hand at 9:00|
The “Compax” or “Bi-Compax” version of Universal Cal. 281 is a hand-winding chronograph movement with hour and minute registers.
Many of the Universal Cal. 281 family were produced in different versions: The basic “Uni-Compax” movement features only a 30 or 45 minute chronograph counter and small seconds with two subdials, the “Compax” or “Bi-Compax” version adds a 12 hour counter with three subdials, and the “Tri-Compax” includes a full calendar and moon phase with four subdials. The “Compax” naming scheme is often confused today, with two-subdial versions often called “bi-compax” and three-subdial configurations “tri-compax” even though this is incorrect.Images are taken from official publications and are used here for commentary and educational purposes. Copyright is held by the original owner as noted.