Hattori SII Caliber VD53B Watch Movement

Manufacturer	Hattori aka Seiko Instruments Inc. (SII)
Caliber Number	VD53B
Type	Quartz
Size	12.75”’ (29.5mm)
Height	4.57mm thick
Jewels	0
Battery Cell Number	371
Battery Life	2 years estimated
Frequency	32,768 Hz
Quartz Type	Tuning fork type quartz crystal
Driving System	Two pole stepping motor
Stem	351117 (0351 1770)/tap 10 (maybe also 351892/tap 11)
Hand Sizes	1.10mm / 0.65mm / 0.20mm
Functions	Central hours; central minutes; central running seconds; small chronograph seconds at 6:00; 60 minute counter at 9:00; date at 4:30
Hacking Seconds?	Yes
Country of Manufacture	Japan
Known Models	Invicta Speedway 9211, Invicta Sea Spider, Meister MSTR Aviator (Add your watch in the comments below…)

Seiko Instruments (SII) caliber VD53B is a 0 jewels quartz chronograph watch movement. The notable feature of this caliber is that it has a central running seconds hands with the chronograph seconds hand located in the subdial at 6:00. This makes the VD53 a good choice for those who want a stop watch timer, but also prefer to see the big seconds hand “ticking”.

You might find this caliber listed as being produced by Hattori aka Epson aka TMI (Time Module Inc) aka Seiko Instruments Inc.

Some of the topics covered in this caliber listing:

Accuracy:

TMI spec sheets claim the caliber to have an accuracy rating of less than +/- 20 seconds per month when worn at normal operating temperatures.

Replacement Price:

Replacement prices at the time of this post were found online in the range of $20-30 USD.

VD53B Technical Drawing:

How to Reset the VD53B Chrono Hand to Zero?

There are many Invicta watches with the caliber VD53, so here are some handy instructions provided by Invicta…

If these don’t work, it’s likely that your watch does not have the VD53, so try these instructions to reset your chronograph hand.

About SII from Wikipedia:

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.