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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

  • StyleDiver's
  • MaterialResin
  • MovementQuartz
  • ShapeRound
  • Dial ColorBlack
  • Dial MarkersIndex
  • 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.

Highlights

  • 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

Specifications

BrandCASIO
StyleDiver's
MaterialResin
MovementQuartz
ShapeRound
Dial ColorBlack
Dial MarkersIndex
DisplayAnalog and Digital
DateDate
Band MaterialResin
FastenerBuckle Clasp
GenderMale
ConditionNew
BezelFixed Bezel
Case MaterialResin
Case Thickness45.00 mm
CrystalMineral Crystal
Water-Resistant200m
Special FeaturesMineral Crystal,Buckle Clasp,Day and Date Display

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.

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