Caliber Number 7753 Movement Type Jewels 27 Power Reserve 48 hours Diameter 13 14’ (30.00mm) Height 7.9mm Vibrations Per Hour 28. 800 Lift Angle 49 degrees Shock System Regulator Etachron Rotor System Winding Direction Uni-directional clockwise Hacking Yes Hand-Windable Yes Features Hours, minutes, small seconds, central chronograph seconds, date, 30 minute counter, 12 hour counter Country of Manufacture Known Models Check (and add yours in the comments below)The ETAValjoux caliber 7753 is an automatic cam type chronograph movement. This movement is from the same family as the . The 7750 and 7753 are very similar. In fact, the 7753 is based on the 7750. Visually (from the dial side), you should be able to tell the difference: 7750 Chronograph subdial counters located at 6:00, 9:00 (small seconds location), 12:00DayDate at 3:00 7753 Chronograph subdials are at 3:00, 6:00, 9:00 (small seconds location)Date at 6:00Mechanically, you can differentiate between the two movements based on the setting of the date. The 7750 date sets by the crown, the 7753 set from a 3rd pusher (see below). If you’re able to see the movement, but cannot see the caliber number stamp, remember that the 7750 has 25 jewels and the 7753 has 27. The date is typically adjusted by a pusher at 10:00 (some watches, like , have it at 9:00).