Hattori SII Caliber VD53B
|Manufacturer||Hattori aka Seiko Instruments Inc. (SII)|
|Size||12 3/4”’ (29.5mm) x 4.57mm thick|
|Battery Cell Number||371|
|Frequency||Unknown (please comment below)|
|Quartz Type||Tuning fork type quartz crystal|
|Stem||35117/tap 10 or 351892/tap 11|
|Functions||Hours, minutes, central seconds, small chronograph seconds, 60 minute counter, date, alarm|
|Country of Manufacture||Japan|
|Known Models||Invicta Speedway 9211|
You might find this caliber listed as being produced by Hattori aka Epson aka TMI (Time Module Inc) aka Seiko Instruments Inc. We’re not sure why all the different names, but sure they all lead back to Seiko. If you anything about this please comment below!
Replacement prices of $20-30 found online.
Seiko Holdings Corporation (SEIKO) delegates a large portion of the manufacturing in its watch business to SII and EPSON. Most of watches manufactured by SII are sold through the Seiko Watch Corporation, a subsidiary of Seiko Holdings Corporation. In recent years Seiko Instruments has tried to establish its own marketing channel and brands – Sizukuishi Watch, appetime, J.SPRINGS, ISSEY MIYAKE, tsumori chisato, ALESSI, cacharel, etc.
On January 26, 2009, Seiko Instruments and Seiko Holdings announced that the two companies will be merged on October 1, 2009 through a share swap. Seiko Instruments became a wholly owned subsidiary of Seiko Holdings on October 1, 2009.