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CASIO

CASIO G-Shock GM-2100B-3A 200M watch

SKU CH-M9NM-WC3V9

A 200 m water-resistant analog-digital diver's watch with a green dial and resin case

  • Watch movementQuartz
  • Product shapeRound
  • Watch face colorGreen
  • Dial markingsIndex
  • Display typeAnalog and Digital
  • Date displayDate
  • 200 m water resistance for serious diving
  • Green dial with analog and digital display for clear reading
  • Quartz calibre 5611 movement for reliable timekeeping
  • 00 mm resin case and strap for lightweight durability
  • Fixed bezel and mineral crystal protect the watch face

Product identity

The Casio G-Shock GM-2100B-3A is a 200 m water-resistant analogue-digital watch with a green dial and resin case. It suits divers and everyday wearers who want a tough quartz timepiece with day and date display. The 5611 calibre drives both the hands and the digital readout.

Setup check

Verify that the 42.00 mm case thickness fits your wrist and that the fixed bezel matches your timing needs. The buckle clasp secures the resin strap without tools, so no extra links or pins are required. Confirm the mineral crystal meets your scratch-resistance expectations.

Sustained load behaviour

Quartz movement maintains steady accuracy during long dives or extended daily wear without the drift seen in mechanical movements. Resin construction resists salt water and UV exposure over months of continuous use. The 200 m rating holds under constant pressure rather than only brief immersion.

How it compares

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

Price $155.99
Pricier than about 57% of the 2,679 comparable items (median $130.99).

Specifications

Product
Brand nameCASIO
Design styleDiver's
Watch face colorGreen
Item conditionNew
Display
Display typeAnalog and Digital
Size & build
Main materialResin
Product shapeRound
Strap materialResin
Closure typeBuckle Clasp
Bezel typeFixed Bezel
Housing materialResin
Case size42 mm
Watch glassMineral Crystal
Environment & compliance
Water resistance200m
More details
Watch movementQuartz
Dial markingsIndex
Date displayDate
Suitable forMale

Questions about this item

Does the GM-2100B-3A come with anything besides the watch itself?

The watch is supplied as a complete unit with its resin case, resin strap and fitted buckle clasp already attached.

How do I choose between the green dial and other colourways for this model?

This specific reference has a green dial with index markers and an analog-digital display; other colours carry different reference numbers.

What does the 200 m water-resistance rating mean for daily wear?

It is rated for 200 metres, making it suitable for swimming, snorkelling and recreational diving, but not for saturation or deep-sea diving.

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