ETA/Valjoux Caliber 7753 Watch Movement

Manufacturer	ETA / Valjoux
Caliber Number	7753
Movement Type	Automatic, self-winding mechanical, chronograph
Lignes	13.25”’
Diameter	30mm
Height	7.9mm
Jewel Count	27 jewels
Beat Rate / Frequency	28,800 bph / 4 Hz
Lift Angle	49 degrees
Power Reserve	48 hours
Shock System	Incabloc
Regulator	Etachron
Rotor System	Ball bearing
Rotor Winding Direction	Clockwise (Uni-directional)
Hand-Windable?	Yes
Hands Count	6
Features	Central hours; central minutes; central chronograph seconds; small seconds at 9:00; 30 minutes chronograph counter at 3:00; 12 hour chronograph counter at 6:00; date at 4:00 or 4:30
Hacking Seconds?	Yes
Country of Manufacture	Switzerland, Swiss made
Known Models	Aquastar AirStar (Top grade), more here (Add your watch in the comments below…)

The ETA/Valjoux caliber 7753 is an automatic cam type chronograph watch movement. This caliber is from the same family as the caliber 7750.

Some of the topics covered in this caliber listing:

7750 vs 7753:

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), 12:00
Day/Date at 3:00

7753

Chronograph subdials are at 3:00, 6:00, 9:00 (small seconds location)
Date at 6:00

Mechanically, 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.

Date Pusher:

The date is typically adjusted by a pusher at 10:00 (some watches, like this Tudor Fastrider, have it at 9:00).

Eta 7753 Date Pusher Montblanc Timewalker

Some watch brands that use this movement opt to not include the pusher in their designs. This could be for water-resistance issues, etc. For example, Breitling labels the ETA 7753 as their caliber 23, and when used in the SuperOcean Heritage, it does not have the calendar corrector.

Changing the Date:

If an ETA 7753 powered watch does not have a pusher integrated into the side of the case (as pictured above), you will have to manually set the date by continuously advancing the hands forward until the desired date is set.