Watch Catalog

Casio G-Shock GBM-2100-1A

Silver, 49.3 × 44.4 mm, module 5729, solar.

  • Japan: GBM-2100-1AJF
  • Module 5729
  • 49.3 × 44.4 mm
  • 200 m
  • Mineral Glass

Specifications

Module
Casio module 5729, solar powered · how to set it
Power
Tough Solar (Solar powered)
Accuracy
±15 seconds per month (with no mobile link function)
Case size
49.3 × 44.4 mm (length × width)
Thickness
11.9 mm
Case
Resin (Bio-based) / Stainless steel
Crystal
Mineral Glass
Water resistance
200 m
Weight
72 g
Strap
Bio-based resin band
Colour
Silver
Features
12/24-hour format, Alarm/hourly time signal, Battery display/alert, Calendar, Date/month display swapping, Day display, Energy saving feature, Hand shift feature, Light, Light color, Mute feature, Run time, Shock Resistant, Stopwatch, Timer, World time
Released
2024-05
Series
Casio G-Shock, GBM-2100

Questions

What is the Japanese model number of the Casio GBM-2100-1A?

Casio's Japanese site names it the GBM-2100-1AJF: the same watch, its code with the Japanese market suffix.

What module is in the Casio GBM-2100-1A?

Module 5729, a solar powered movement. The module number is engraved on the caseback, and Casio's operation manual is filed under it: the module page links the manual and lists every watch that shares it.

Does the Casio GBM-2100-1A need a battery change?

No routine change: it is solar powered and recharges its cell from light. Casio's power spec: Tough Solar (Solar powered).

Does the Casio GBM-2100-1A have a sapphire crystal?

No. The GBM-2100-1A has a Mineral Glass crystal.

How water resistant is the Casio GBM-2100-1A?

200 m (20 bar). That covers swimming, snorkelling and skin diving; it is a certified diver's watch only if the brand says so.