Seiko Caliber PC32A Watch Movement

Seiko Sii Caliber Pc32a

Manufacturer	Seiko Instruments Inc. (SII)
Caliber Number	PC32, PC32A
Movement Type	Quartz
Lignes	10.5”’
Diameter	23.7mm
Casing Diameter	18.10mm
Height	4.15mm thick
Jewels	0
Battery Cell Number	SR626SW
Quartz Type	Tuning fork
Frequency	32,768 Hz (cycles per second)
Driving System	2 pole step motor
Accuracy Rating	See below…
Stem	0354-3000 (354300), 354128 (old)
Hand Sizes	1.20mm / 0 .70mm / 0.17mm
Functions	Central hours; central minutes; central seconds; date at 3:00 (or between 4:00 and 5:00 depending on the watch design)
Hacking Seconds?	Yes
Country of Manufacture	Japan
Known Models	Android Aragon Ladies Watch (Too many to list, add your watch in the comments below…)

The Seiko caliber PC32A is a quartz movement is made in Japan. It is a 0 jewels movement with 3 hands and a date.

You may see this movement listed under Seiko, SII (Seiko Instruments), Hattori, or Epson. Learn more here.

The caliber number is located one of the metal pieces going across the movement:

Some of the topics covered in this caliber listing:

Accuracy:

Time Module Inc. claims that the caliber PC32A will maintain accuracy of: “Less than 30 seconds per month at normal temperature range.”

Battery Replacement:

The battery in the PC32A is a cell number 377 aka SR626SW. It is held in place with a friction arm. Gently (read again, gently) pry the battery up and out (carefully prying back the friction arm if needed). Insert the new battery in the opposite order.

Here is a macro shot of the battery slot and the text at the bottom:

Replacement Price:

Replacement prices of this watch movement were found online in the range of $8.95.

Caliber Drawings:

Seiko Sii Tmi Hattori Caliber Pc32a Drawing

Watches with this movement:

The PC32A example pictured below was found in an Android (Aragon) ladies watch. Please add your watch in the comments below…

Date/Factory Codes?

Between the manufacturer name and the caliber number is a group of scrambled letters and numbers. This is likely either a date code or factory code. If anyone has insight into this, please comment below. The two examples shown on this page are:

UM5N
VH5N

Additional Resources:

TMI PC32A tech sheet (pdf)

11 Comments

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Paul Bowman HMS ONE Review - Wristwatch Review UK

2 years ago

[…] I’ve said, the watch is based around a quartz movement – a Seiko PC32A. Hardly a precision piece of modern mechanical engineering, but a step above the no-name movements […]

List of Seiko Watch Movements Watch Movement | Caliber Corner

10 months ago

[…] PC32A […]

Hattori SII Caliber PC33A Watch Movement | Caliber Corner

9 months ago

[…] 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 […]

Stephen

3 months ago

I am replacing one branded SII, the new one is branded TMI, I needed one with date at 6, the cheapest ones are with date at 3, I bought one of those and swapped the date rings over.

calibercorner

Reply to Stephen

Hi Stephen, thank you for sharing this with the community. If you have pics of both side-by-side, and the date rings, please post them 🙂

2 months ago

Reply to calibercorner

I had not taken any photos before reassembly, but have these from the old movement,

And these,

Jonhathan

Hi Stephen, would you mind to share the process to swap the date rings between those movements?

Thanks.

Reply to Jonhathan

Hello Jonhathan, viewing the date wheel side, there is a silver cover in the centre, clipped in position by several bits of it that are formed into clips, you can easily prise this off with a micro screwdriver, use a loupe also, hold a finger or something over the silver cover in case it pings off. When this cover is off you can just lift the date ring out. There is a black plastic cog… Read more »

…also, the hour wheel and dial washer stayed in place, through the silver cover, so that was something that made it even easier.

Update, I located the movement again, misremembered, no other plastic thing, recess is to position the silver cover, so, easier than I first mentioned. Only the black cog has to be in place, before you put the silver cover back on, the hour wheel in the centre of the cover just has to be lined up onto the centre post. (You put the date wheel back in place before fitting the silver cover).

Seiko Caliber PC32A