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 grey dial analog digital watch with bio based resin case and strap, 45.40 mm thick, 200 m water resistant

CASIO

CASIO G-Shock GA-B2100LUU-8A Grey Dial Tough Solar 200M Watch

SKU CH-GKQH-GEK26

A solar-powered analog-digital sports watch with a 45.40 mm bio-based resin case, 200 m water resistance and smartphone link

  • StyleSports
  • MaterialResin
  • MovementSolar
  • ShapeRound
  • Dial ColorGrey
  • Dial MarkersIndex
  • Bio-based resin case reduces environmental impact
  • Tough Solar movement charges from any light source
  • 200 m water resistance suits diving and swimming
  • Shock-resistant construction protects against daily impacts
  • Smartphone Link enables automatic time correction

Grey Dial Tough Solar Watch

The Casio G-Shock GA-B2100LUU-8A is a solar-powered sports watch built for daily wear and outdoor activity. Its bio-based resin case and strap reduce environmental impact while maintaining the brand’s shock-resistant construction. The analog-digital display shows month, day and date at a glance. It suits anyone wanting a tough, low-maintenance timepiece with 200-metre water resistance.

200-Metre Water Resistance and Solar Power

The 200 m rating covers swimming, snorkelling and surface water sports, but not scuba diving with compressed air. Tough Solar charges the battery from any light source, removing the need for regular cell changes. Power reserve lasts months in darkness once fully charged. The fixed bezel and mineral crystal protect the dial from knocks and scratches during active use.

Smartphone Link Limits

Bluetooth smartphone link enables automatic time correction, world-time setting and alarm management through the Casio Watches app. The connection requires a compatible phone and the app running in the background. It does not deliver call, message or notification alerts on the watch face. Firmware updates are not supported over the link.

Highlights

  • Bio-based resin case reduces environmental impact
  • Tough Solar movement charges from any light source
  • 200 m water resistance suits diving and swimming
  • Shock-resistant construction protects against daily impacts
  • Smartphone Link enables automatic time correction

Specifications

BrandCASIO
StyleSports
MaterialResin
MovementSolar
ShapeRound
Dial ColorGrey
Dial MarkersIndex
DisplayAnalog Digital
DateDate
Band MaterialResin
FastenerBuckle Clasp
GenderMale
ConditionNew
BezelFixed Bezel
Case MaterialResin
Case Thickness45.40 mm
CrystalMineral Crystal
Water-Resistant200m
Special FeaturesMineral Crystal,Buckle Clasp,Month, Day And Date Display

Questions about this item

Will the 45.40 mm case sit comfortably alongside a vintage 40 mm diver on the same wrist?

The 45.40 mm resin case is larger than a classic 40 mm diver, so it will feel noticeably bigger and heavier on the same wrist.

How can I confirm the Tough Solar movement is charging correctly after first exposure to light?

The analog-digital display shows a charge-level indicator; a rising bar or "H" symbol confirms the solar cell is converting light into power.

Does the box include a heart-rate sensor or charging cable, or must I buy them separately?

The package contains the watch with bio-based resin strap, buckle clasp and manual; no heart-rate sensor or charging cable is supplied or required.

Also in this aisle

People compared these

Same shelf, same checkout — eight coins and a 30-minute rate lock.