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
Black resin round watch with analog digital display and buckle clasp

CASIO

CASIO G-Shock GA-2100-1A 200M Diver's Watch 45.00 mm

SKU CH-602W-8DK40

Analog-digital diver's watch with 200 m water resistance, carbon-reinforced resin case and double LED light

  • Watch movementQuartz
  • Product shapeRound
  • Watch face colorBlack
  • Dial markingsIndex
  • Display typeAnalog and Digital
  • Date displayDate
  • Carbon Core Guard structure delivers high rigidity with low weight
  • 200 m water resistance suits professional diving
  • Double LED light illuminates analog and digital displays
  • Quartz movement keeps precise time with date and day
  • Resin case and strap resist shock and daily wear

Carbon Core Guard Diver's Watch

The Casio G-Shock GA-2100-1A combines analog and digital displays in a 45.00 mm resin case reinforced with carbon fiber. A quartz movement powers the hands and digital readouts while a double LED light illuminates both dial and display. Water resistance is rated to 200 m and the mineral crystal protects the black dial with index markers.

Everyday Wear Versus Professional Diving

The watch suits daily use, swimming and recreational diving thanks to its shock-resistant Carbon Core Guard structure and 200 m rating. Buyers who require a screw-down crown, helium valve or metal bracelet will not find those features here. The fixed bezel and buckle clasp keep operation simple for casual wearers.

200 m Water Resistance Decides Suitability

The 200 m rating is the single specification that determines whether this model matches the intended activity. It covers surface sports, snorkelling and recreational scuba diving but not saturation diving. Check the rating against the planned depth before purchase.

How it compares

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

Price $89.99
Cheaper than about 61% of the 2,679 comparable items (median $130.99).

Specifications

Product
Brand nameCASIO
Design styleDiver's
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

Will the 45.00 mm resin case sit flush on a 7-inch wrist without overhang?

The 45.00 mm case diameter is measured lug-to-lug, so a 7-inch wrist typically shows a small gap on each side; the flexible resin strap conforms to the contour for a secure fit.

How do I set the analog hands to match the digital time on the GA-2100-1A without losing the 200 m water resistance?

Pull the crown to the second click, rotate until the hands match the digital display, then push and screw the crown fully back in; the 200 m rating is maintained only when the crown is locked.

When should I replace the mineral crystal or the carbon-fibre-reinforced resin bezel on this diver's watch?

Replace the mineral crystal if deep scratches impair legibility or a crack appears; the resin bezel only needs replacement if impact damage compromises the Carbon Core Guard structure or the buckle clasp no longer secures.

More in Analog & Digital Wristwatches

Similar items