Casio GS-500 / MRG-121 Manual — Module 1789

One owner's manual PDF for the Casio module 1789 in English. Casio fitted it in the GS-500 and MRG-121. Casio's spec sheet lists one CR2016, with 3 years of battery life and accuracy within ±20 seconds a month; the module first shipped in Dec 1998.

Module details

Brand: Casio

PDF files: 1

Released: Dec 1998

Mapped models: 2

Module specs

Battery: CR2016 (lithium)

Rated battery life: 3 years

Rated accuracy: ±20 sec/month

Casio service manual ref: S/M-625

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Owner manuals

Owner manual / English

PDF

29 KB

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Watch models using this module

Model	Released
GS-500	1998
MRG-121	1998