We take cryptocurrency — so the coins you hold can buy real hardware.Pay in crypto, spend it on real hardware. Free insured shipping worldwide over $399. Plain, unbranded boxes, sent from Germany.Free insured shipping over $399. Your rate is locked for 30 minutes once checkout opens.Rate locked 30 minutes. Every item sealed, serial-checked and covered by a 24-month warranty.Sealed, 24-month warranty.

Saved items Sign in
Round stainless steel watch with copper dial and metal bracelet

CASIO

CASIO G-Shock GM-B2100AD-5A 44.40 mm copper dial solar watch 200 m

SKU CH-W1TV-G3BTZ

Solar-powered analog-digital watch with a copper dial, stainless-steel case and bracelet, and 200 m water resistance

  • Watch movementSolar
  • Product shapeRound
  • Watch face colorCopper
  • Dial markingsIndex
  • Display typeAnalog Digital
  • Date displayDate
  • Solar charging keeps the watch running without battery changes
  • 200 m water resistance suits swimming and surface diving
  • Stainless steel case and bracelet resist daily impacts
  • Analog-digital display shows month, day and date at a glance
  • Copper dial adds distinctive colour to the 44.40 mm case

Stainless-steel solar watch

The Casio G-Shock GM-B2100AD-5A combines a full stainless-steel case and bracelet with a copper dial. Tough Solar movement keeps the analog-digital display running without regular battery changes. Shock-resistant construction and 200 m water resistance suit daily wear and swimming. The deployment clasp secures the metal bracelet on the wrist.

Thermals noise and power draw in normal use

Solar charging eliminates the need for disposable cells, so the watch draws no external power in daily use. The sealed stainless-steel case and mineral crystal produce no audible noise. Temperature stability is handled by the standard G-Shock module inside the 44.40 mm case. No active cooling or power management is required.

Smartphone Link and bundled features

Smartphone Link connects the watch to a companion app for automatic time correction and alarm management. The analog-digital display shows month, day and date alongside the hands. Mineral crystal protects the copper dial from scratches. The fixed bezel and deployment clasp complete the supplied feature set without extra accessories.

How it compares

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

Price $330.99
Pricier than about 85% of the 2,679 comparable items (median $130.99).

Specifications

Product
Brand nameCASIO
Design styleSports
Watch face colorCopper
Item conditionNew
Display
Display typeAnalog Digital
Size & build
Main materialStainless Steel
Product shapeRound
Strap materialStainless Steel
Closure typeDeployment Clasp
Bezel typeFixed Bezel
Housing materialStainless Steel
Case size44.4 mm
Watch glassMineral Crystal
Environment & compliance
Water resistance200m
More details
Watch movementSolar
Dial markingsIndex
Date displayDate
Suitable forMale

Questions about this item

How do I pair the GM-B2100AD-5A with my phone for time sync and what step is often missed?

Install the CASIO Watches app, enable Bluetooth on the phone, then hold the watch's lower-left button until the Bluetooth icon flashes; the step often missed is granting the app location permission, which is required for the pairing handshake to complete.

What maintenance will the solar movement and 200 m seal need over time?

The Tough Solar cell recharges from any light; keep the dial exposed regularly. Have the water-resistance seals pressure-tested and the gaskets replaced every two to three years to maintain the 200 m rating.

At what point does the 44.40 mm case thickness become the limiting factor during all-day wear?

The 44.40 mm thickness sits higher on the wrist than slimmer models, so it contacts cuffs and desk edges first; this physical clearance issue appears before weight or battery life becomes noticeable.

More in Analog & Digital Wristwatches

Similar items