Manufacturer | Hattori aka Seiko Instruments Inc. (SII) |
Caliber Number | PC21S |
Type | Quartz |
Size | 18.5mm x 3.15mm thick (overall height 4.8mm) |
Battery Cell Number | SR626SW |
Frequency | 32,768 hz |
Quartz Type | Tuning fork type quartz crystal |
Stem | 354222 / tap 10 |
Hand Sizes | 1.20 / .70 / .17mm |
Jewels | 0 |
Functions | Hours, minutes, seconds |
Country of Manufacture | Singapore |
Known Models | Most cheap quartz watches from China. Add yours to the comments below. |
The Seiko Instruments caliber PC21S is a 0 jewels quartz movement found in many ultra-entry level timepieces.
Some of the topics covered in this caliber listing:
Labeling:
You might find this caliber listed as being produced by Hattori aka Epson aka TMI (Time Module Inc) aka Seiko Instruments Inc. Learn more about this here.
Accuracy:
The documentation from Time Module states an accuracy of “Less than 30 seconds per month at normal temperature range.”
Replacement Prices:
Replacement prices of $7.95 were found online at the time of this post.
Drawing:
Additional Resources:
- Official TMI tech sheets and drawings here
- Similar Cal. PC21J
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