Hattori SII Caliber PC21S

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.

Note: This caliber number is often misread as “PC215”.

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 for the calibre PC21S were found in the range of $2.00 to $7.95 USD at the time of this post.

Drawing:

Additional Resources:

• Official TMI tech sheets/drawings (pdf)
• Similar Cal. PC21J