Manufacturer | Hattori aka Seiko Instruments Inc. (SII) |
Caliber Number | PC21S |
Type | Quartz, battery-powered |
Diameter | 18.5mm |
Height | 3.15mm thick (overall height 4.8mm) |
Jewels | 0 |
Frequency | 32,768 Hz |
Battery Cell Number | SR626SW |
Estimated Battery Life | 2 years |
Quartz Type | Tuning fork type quartz crystal |
Stem | 354222 / tap 10 |
Hands Count | 3 |
Hand Sizes | 1.20 / .70 / .17mm |
Functions | Central hours; central minutes; central seconds |
Country of Manufacture | Made in Singapore |
Known Models | Many cheap quartz watches from China (Add your watch to the comments below…) |
Seiko Instruments caliber PC21S is a 0 jewels quartz movement found in many ultra-entry level timepieces. This 3-hander caliber is a true no-date movement.
Some of the topics covered in this caliber listing:
Manufacturer 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.
Country of Origin Labeling:
You also may see sellers listing this as a “Japan” movement or “made in Japan”, despite the movement actually being signed “Singapore”.
Accuracy Rating:
Official claims from Time Module, Inc. states an accuracy of “less than 30 seconds per month at normal temperature range,” aka +/- 30 seconds/month.
Replacement Prices:
Replacement prices of $7.95 were found online at the time of this post.
Drawing:
Additional Resources:
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