Watch Catalog

Casio G-Shock GM-B2100AD-2A

Silver, 49.8 × 44.4 mm, module 5691, solar.

  • Japan: GM-B2100AD-2AJF
  • Module 5691
  • 49.8 × 44.4 mm
  • 200 m
  • Mineral Glass
  • $550

Specifications

Module
Casio module 5691, solar powered · how to set it
Power
Tough Solar (Solar powered)
Accuracy
±15 seconds per month (with no mobile link function)
Case size
49.8 × 44.4 mm (length × width)
Thickness
12.8 mm
Case
Stainless steel
Crystal
Mineral Glass
Water resistance
200 m
Weight
165 g
Strap
Stainless Steel 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
2024-03
Series
Casio G-Shock, GM-B2100

Questions

What is the Japanese model number of the Casio GM-B2100AD-2A?

Casio's Japanese site names it the GM-B2100AD-2AJF: the same watch, its code with the Japanese market suffix.

What module is in the Casio GM-B2100AD-2A?

Module 5691, 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 GM-B2100AD-2A 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 GM-B2100AD-2A have a sapphire crystal?

No. The GM-B2100AD-2A has a Mineral Glass crystal.

How water resistant is the Casio GM-B2100AD-2A?

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