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Black resin G-Shock watch with octagonal case and analog-digital display

CASIO

CASIO G-Shock GA-2100-1A1 Black watch

SKU CH-DHCZ-CMJ40

A slim 11.8 mm carbon-core G-Shock with analog-digital display, 200 m water resistance and mineral crystal

  • Watch movementQuartz
  • Product shapeRound
  • Watch face colorBlack
  • Dial markingsIndex
  • Display typeAnalog and Digital
  • Date displayDate
  • Ultra-thin 11.8 mm profile enabled by carbon-fibre reinforced resin
  • Shock-resistant structure protects the module inside a carbon core guard case
  • 200 m water resistance suits serious aquatic activities
  • Analog-digital display combines traditional hands with digital readouts
  • Heritage octagon design traces back to the 1983 DW-5000C original

Thin carbon core guard

The CASIO G-Shock GA-2100-1A1 uses a carbon core guard structure that encloses the module in a carbon case. Fine resin embedded with carbon fibres gives the case outstanding strength and crack resistance while keeping it 11.8 mm thin. This makes it the thinnest G-Shock combination model available.

200-metre water resistance

The watch is rated for 200 metres of water resistance, suitable for professional marine activity and serious surface water sports. A mineral crystal protects the analog-digital display, and the fixed bezel sits on a resin case measuring 45.00 mm thick. Quartz movement powers the day and date functions.

Everyday wearers needing slim toughness

Buyers who want a lightweight, shock-resistant watch for daily use and water sports will find the thin profile and carbon-reinforced case practical. Those who require a larger case diameter, metal bracelet, or smartwatch connectivity should consider other models.

How it compares

Measured against everything we stock in Analog & Digital Wristwatches, at today’s prices. Recalculated every night.

Price $95.99
Cheaper than about 59% of the 2,679 comparable items (median $130.99).

Specifications

Product
Brand nameCASIO
Design styleSports
Product colorBlack
Watch face colorBlack
Item conditionNew
Display
Display typeAnalog and Digital
Size & build
Main materialResin
Product shapeRound
Strap materialResin
Closure typeBuckle Clasp
Bezel typeFixed Bezel
Housing materialResin
Case size45 mm
Watch glassMineral Crystal
Environment & compliance
Water resistance200m
More details
Watch movementQuartz
Dial markingsIndex
Date displayDate
Suitable forMale

Questions about this item

What does the 11.8 mm thickness mean for everyday wear?

The carbon-reinforced resin case is the thinnest in the G-Shock combination line, so it sits low on the wrist and slides under a shirt cuff easily.

What does the 200 m water-resistance rating allow in practice?

It is suitable for swimming, snorkelling and recreational diving, but not for saturation or professional deep diving.

What physical details determine whether the watch fits my wrist?

The case measures 45.00 mm across, the band is resin with a buckle clasp, and the profile is 11.8 mm thin.

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