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Orbis Collectibles

Casio — G-Shock GA-100

Also known as: G-Shock GA-100

DocumentedSupported by at least one credible specialist source.

Record status

Documented family · partial

Maker / issuer

Casio

G-Shock GA-100 is a wristwatch family made by Casio. Recorded movements are Casio caliber 5081, with functions including world time, perpetual calendar, chronograph, countdown and alarm.

The sampled references record case diameters of 55 mm, heights of 16.9 mm, cases in resin and water resistance of 200 m. Reference examples: ref. GA-100-1A1 (GA-100-1A1 Black Black; 55.00 mm); ref. GA-100-A9 (GA-100A-9A Bumblebee; 55.00 mm); ref. GA-100B-7A (GA-100B-7A White Blue; 55.00 mm); ref. GA-100MC-1A4 (GA-100MC-1A4 Orange NATO; 55.00 mm).

Evidence at a glance

Linked sources
2
Photograph views
4
Catalogue references
5

Counts describe this entry’s documentation, not authenticity, rarity or completeness. Photographs may show one specimen; check each caption and licence.

Physical characteristics

Crystal
Mineral
Case back
Closed
Case shape
Round
Case height
16.9 mm
Case materials recorded
Resin
Case diameter (sampled references)
55 mm

Technical characteristics

Functions recorded
World Time, Perpetual Calendar, Chronograph, Countdown, Alarm
Movements recorded
Casio caliber 5081
Water resistance recorded
200 m

Design

Hands
Proprietary
Hour markers
Stick / Dot
Dial colours recorded
Black

Identification

How to identify
The reference number, usually found on the case back, between the lugs or on papers, ties a watch to one of these configurations; movement calibre, case material and dial together separate references within the family.
Family as listed
G-Shock GA-100
References sampled
GA-100-1A1 — GA-100-1A1 Black Black · GA-100-A9 — GA-100A-9A Bumblebee · GA-100B-7A — GA-100B-7A White Blue · GA-100MC-1A4 — GA-100MC-1A4 Orange NATO
Distinguishing features
Reference number, movement calibre, case material and dial colour together
Representative reference
GA-100-1A1
Source note
All figures follow WatchBase and describe only the references sampled here; they have not been checked against the manufacturer's archive. WatchBase, an online database of watch references, lists 13 references under this family name; this entry summarises 4 of them, chosen across that list, including the reference originally recorded for this entry. The reference list, calibres and case specifications summarised above come from WatchBase; the manufacturer's own archive or a printed reference work should be consulted before treating any detail as definitive. WatchBase does not record production years for the references sampled here, so the family's introduction date and production span remain Research Required.

Catalogue references

Varieties

  • Ref. GA-100-1A1 — GA-100-1A1 Black Black

    Casio caliber 5081; 55.00 mm resin; Black dial. Source: WatchBase.

  • Ref. GA-100-A9 — GA-100A-9A Bumblebee

    Casio caliber 5081; 55.00 mm resin; Black dial. Source: WatchBase.

  • Ref. GA-100B-7A — GA-100B-7A White Blue

    Casio caliber 5081; 55.00 mm resin; Black dial. Source: WatchBase.

  • Ref. GA-100MC-1A4 — GA-100MC-1A4 Orange NATO

    Casio caliber 5081; 55.00 mm resin. Source: WatchBase.

Research required

  • Research Required: confirm the family's introduction date, full reference list and production span against the manufacturer's archive or a printed reference; WatchBase figures cover only the sampled references.
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