Seiko Caliber 7C46
Seiko Caliber 7C46

Seiko Caliber 7C46

Manufacturer Seiko
Caliber Number 7C46, 7C46A
Movement Type Quartz
Diameter
28.6mm overall (27mm between 3:00 and 9:00)
Height
3.7mm
Jewels
7
Frequency
32,768 Hz
Battery Cell
SR43SW (301)
Battery Life
5 years
Accuracy Rating
Less than +/- 15 seconds/month
Driving System
Step motor with load compensated driving pulse type
Integrated Circuit
C-MOS-IC
Regulator?
Yes (pattern cutting system
Hand Count 3
Functions Central hours; central minutes; central seconds; day/date at 3:00
Hacking Seconds?
Yes
Country of Manufacture Made in Japan
Known Models
Seiko Tuna (Ref: SBDS018, SSBS018) (Add your watch to the comments below…)

The Seiko caliber 7C46 is a quartz watch movement with a long battery life, high torque and a rate trimmer for regulating to precise accuracy.

Official Tech Sheets (pdf):

Additional Resources:

Note: This caliber listing is still being updated, but feel free to start discussions on it in the comments below…

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