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Casio AT-550 / AT-552G Manual — Module 320

One owner's manual PDF for the Casio module 320 in English. Casio fitted it in the AT-550 and AT-552G. Casio's spec sheet lists one 396, with 12 months of battery life and accuracy within ±15 seconds a month; the module first shipped in Feb 1984.

Module details

Brand: Casio

PDF files: 1

Released: Feb 1984

Mapped models: 3

Module specs

Battery: 396 (silver-oxide)

Rated battery life: 12 months

Rated accuracy: ±15 sec/month

Casio service manual ref: S/M-148

Open Casio battery finder

Owner manuals

Watch models using this module

ModelReleased
AT-5501984
AT-550- AKA [Janus Touch Screen]1984
AT-552G- AKA [Janus Cal]1984

Watches in stock using this module

$234.00eBay $260.00
NOS Rare Vintage Casio Cyber Max JG-320 Punch Force Digital Game Watch JDM 1990s

NOS Rare Vintage Casio Cyber Max JG-320 Punch Force Digital Game Watch JDM 1990s

$719.10eBay $799.00
Rare Vintage Casio AT-550 Janus Ana-Digi Touchscreen Calculator Watch JDM 1980s

Rare Vintage Casio AT-550 Janus Ana-Digi Touchscreen Calculator Watch JDM 1980s

$2,025.00eBay $2,250.00
Rare Vintage Casio AT-550 Janus Ana-Digi Touchscreen Calculator Watch JDM 1980s

Rare Vintage Casio AT-550 Janus Ana-Digi Touchscreen Calculator Watch JDM 1980s