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A new G-SHOCK standard-bearer in the octagonal form of the original model, but now in metal


In a modern update to the concept and design of the first-ever G-SHOCK (DW5000) and the brand’s first analogue model (AW500), the GA2100 offers a slim, compact form, now in metal. With its enhanced strength and still greater beauty, we’re proud to introduce the metal-clad, octagonal GM2100.


Size specification chart
Metal-clad shock-resistant structure

Ever evolving toughness:
Metal-clad shock-resistant structure

A stainless steel bezel with exceptional strength and inner case made of damage- and deformation-resistant glass fibre-reinforced resin safeguards the module. Tiny protrusions on the inner case reduce surface contact with the bezel to cushion shocks to the module. Cutting-edge technology is applied to the original G-SHOCK concept of hollow construction to deliver a shock-resistant structure with a metal exterior.

Tough Octagonal form

Octagonal form exudes toughness

The bezel adopts the octagonal design motif the G-SHOCK has featured since the very first watch. Undergoing painstaking processes of forging, cutting and polishing, the bezel is precisely crafted — from its intricately shaped face to the form of its back, which is the key to the precision fit it makes with the inner case. A round hairline finish is applied to the top surface and a mirror polish to the sides, giving the bezel a beautiful gleam.

Beautiful minimalist form

Minimalist beauty of form:
Wafer-thin design

We achieved shock resistance with the bare minimum case thickness by adopting a metal-clad shock-resistant structure. Optimised, high-density mounting of the circuit board structure made it possible to slim the module even further. The result is an exceptionally slim design for an analogue-digital combination model with a metal case and a comfortable fit on the wrist.


Casual flair: Textured band

Casual flair:
Textured band

The watch’s urethane band employs a minutely detailed square dot texture. Sophisticated moulding technology was used to achieve textural intricacy with incremental variations in dot size. A slide lever makes it easy to attach and remove the band.

Meticulous detail: Dial with metallic vapor deposition

Meticulous detail:
Dial with metallic vapor deposition

Mirror and hairline finishes are applied to the surface of the dial to achieve texture fitting for a metal model dedicated to maintaining a meticulous level of attention to detail.

IP colours with individual character

IP colours with individual character

The watch is offered in a choice of three colors: silver, which accentuates the hard texture of the metal (GM2100), along with dark blue IP (GM2100N) and dark grey IP (GM2100B) options. These classy colors elevate the watch to true fashion item status.


  • Shock-resistant structure
  • 20-bar water resistance
  • Hand shift feature
  • World time (48 cities)
  • 1/100-second stopwatch
  • Countdown timer
  • 5 daily alarms
  • Double LED light (Super Illuminator)