Citizen Caliber 2502

Manufacturer	Citizen Watch Co.
Caliber Number	2502, 2502M, M-2502
Movement Type	Quartz, battery-powered
Jewel Count	No jewels (0)
Frequency	32,768 Hz
Accuracy Rating	+/- 15 seconds/month
Battery Cell #	SR920SW / 371 (Citizen part # 280-31)
Battery Life	Up to 5 years
Hand Count	3
Functions	Central hours; central minutes; central seconds; day and date at 3:00
Hacking Seconds?	Yes
Other Features	Low battery indicator (EOL)
Country of Manufacture	Made in Japan
Known Models	Citizen Promaster Divers (Ref: 2502-H23265, 2502-H23273, 2502-S046769), Citizen Independent (Ref: 2502-003089-01) (Add your watch to the comments below…)

The Citizen caliber 2502 is a quartz watch movement with a day-date calendar, with zero jewels.

While the calibre number itself is 2502, the example above is signed “2502M”. Interestingly, when Citizen packages a brand replacement movement, the number is “M-2502”.

Additional Resources:

• Citizen 2502 instruction manual (pdf)

Image submitted by J.Barakauskas