There is no verified UWM2 module or documented conversion procedure for the Casio GA-110 in the available sources. That means a reliable step-by-step guide cannot be given: the module’s identity, fitment, installation requirements, and effect on the watch’s factory specifications have not been established. First, clarify what “automatic” means—mechanical self-winding or automatic time adjustment—because those are different functions.
What “automatic” could mean
Mechanical self-winding
A mechanical automatic watch uses a rotor to wind a mainspring as the watch moves. The GA-110 is an analog-digital electronic watch, not a mechanical self-winding watch. Casio’s specifications for the GA110MW-7A identify module 5146, analog hour and minute hands, digital time and date functions, and a speed dial. Those details apply to that cited variant; check the specific watch and its manual rather than assuming every GA-110 has identical specifications. Casio’s GA110MW-7A specifications
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Automatic time adjustment
“Automatic” can also refer to electronic timekeeping features such as radio, GPS, or phone-linked time adjustment. Casio says some G-SHOCK models have such features, but that does not establish that the GA-110 has them or that a UWM2 module adds them. Casio’s overview of automatic timekeeping
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No source available here identifies UWM2 as a watch movement or module, names its maker, or documents a fitment for any GA-110 variant. Compatibility therefore remains unverified—not disproved, but not something a buyer or watchmaker should assume. The term may refer to a private, new, or differently named project; without primary documentation, it cannot support a conversion recommendation.
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A third-party listing for Casio part 10383567 describes a module with movement for six specific GA110 variants and marks it discontinued. It is a replacement-part listing, not evidence of a mechanical automatic conversion or UWM2 fitment. Confirm the exact model and part compatibility before treating any replacement module as suitable. CasioPart listing for part 10383567
Why a step-by-step conversion guide would be unsafe to invent
A credible procedure would need documentation for the exact module and donor watch. In particular, it would need to establish:
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- Who makes the module and what movement it contains.
- Its dimensions, mounting points, and clearance inside the GA-110 case.
- Compatibility with the dial, hands, controls, and digital display—or confirmation that those functions are lost.
- How it is powered, including any battery or rotor arrangement.
- The required installation, sealing, and testing procedure.
Those details have not been established for UWM2. Without them, instructions to remove the factory module, fit hands, solder, machine the case, or reassemble the watch would be speculation, not a usable how-to.
What to check before modifying a GA-110
- Read the module number from the watch. Casio says instructions vary by module. Use the number on your actual watch to find its matching manual; do not rely on instructions for another GA-110 variant. Casio’s module-specific manual guidance
- Ask for primary UWM2 documentation. Request the module maker’s exact product identification, compatibility list, installation instructions, and specifications. A product name or seller claim alone does not demonstrate fitment.
- Confirm the trade-offs in writing. Establish which original functions remain, what the movement requires, and whether the installer will test the finished watch.
- Do not infer factory performance after modification. Casio lists shock resistance and 200 m water resistance for the GA110-1B, but those are factory-model claims, not proof that a modified watch retains either rating. Casio’s GA110-1B product page
What can be said about GA-110 specifications
Casio lists ±15 seconds per month accuracy and an approximate two-year CR1220 battery life for the GA110MW-7A. These are manufacturer specifications for that cited variant, not independent test results or guarantees for every GA-110. They do not describe a UWM2 conversion. Casio’s GA110MW-7A specifications
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For a replacement or repair, search by the exact GA-110 variant and module number, then verify fitment with Casio documentation or a qualified watchmaker. A listing for a GA-110 watch or replacement module does not establish that it can be converted to mechanical automatic operation.
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