Hattori SII Caliber PC33A Watch Movement

Manufacturer	Hattori aka Seiko Instruments Inc. (SII)
Caliber Number	PC33A, PC33
Type	Quartz
Size	10.5”’
Diameter	23.7mm
Height	4.15mm
Jewels	0
Battery Cell Number	SR626SW (377 / 376)
Battery Life	~3 years
Frequency	32,768 Hz
Accuracy	+/- 30 seconds per month
Stem	354300 / tap 10
Hand Sizes	1.20mm / .70mm / .20mm
Functions	Central hours; central minutes; central seconds; day/date at 3:00
Hacking Seconds?	Yes
Quickset Day/Date?	Quickset date, no quickset for the day
Country of Manufacture	Japan
Known Models	Timex Q Reissue (Add your watch to the comments below…)

The Seiko Instruments (SII) caliber PC33A is a 0 jewels quartz movement that is made in Japan. TMI (Time Module Inc.) who handles production and distribution of this movement, categorizes this caliber as part of their Standard Movement line. It is among the cheapest/most affordable calibers made by Seiko. This movement is found in many entry level/cheap quartz watches.

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.

Similar Calibers:

One of the most popular entry level quartz calibers is the SII PC32A. This PC33 discussed here basically the same as the PC32, but with the addition of a day of the week complication (the PC32 only has the day).

There is also a PC23 in the Standard Movement line with a day/date display, but it is the smaller version with an 18.5mm diameter vs the 23.7mm diameter of the PC33.

Accuracy:

Official documentation claims that the PC33A has an accuracy rating of “Less than 30 seconds per month at normal temperature range.” The normal temperature range they are talking about is between -5C to +50C (23F to 122F).

Battery:

The battery in the PC33 is a cell number SW626Sw, also known as 377/376. A fresh battery should last about 3 years. When replacing the battery, be sure to slip the cell under the thin tab before pressing down. See picture below: