WHICH WATCH FITS

Casio G-SHOCK GBA-900-1A

Casio · G-SHOCK

Casio G-SHOCK GBA-900-1A

Casio G-SHOCK GBA-900-1A (reference GBA-900-1A) — specifications, measurements, watch images and standardized wrist-fit previews for informed comparison.

A 51.3 mm everyday watch with quartz movement.

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Best forWearers seeking a versatile watch for regular use.

Not ideal forSmall wrists or wearers who prefer compact watches.

At a glance

ReferenceGBA-900-1A

CollectionG-SHOCK

Production statusCurrent

Movement InfoQuartz

Case diameter Info51.3 mm

OriginJapan

Price categoryNot available

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Casio G-SHOCK GA-B2100-1AQuartz · GA-B2100-1A

Casio G-SHOCK GM-B2100D-1AQuartz · GM-B2100D-1A

Casio G-SHOCK GMC-B2100D-1A Full Metal Chronograph46.3 mm · Quartz / Solar · Chronograph / dual time · GMC-B2100D-1A

Casio G-SHOCK GW-5000U-1Quartz · GW-5000U-1

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See sources

Manufacturer and technical references used to verify this watch specification.

Official website

Specifications last verified: 2026-08-11.

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