Casio · Model Reference
Casio G-Shock GA-2100
The so-called CasiOak combines a thin octagonal case with G-Shock durability and broad colour variety.
Launch2019
ReferenceGA-2100
TypeAnalog-digital G-Shock
Case48.5 mm
Market Pricing · July 2026
Price guide.
What affects value
Exact module, condition, bracelet, regional version, box and papers; rare colours or discontinued editions can command a premium.
Indicative European market ranges in EUR. Exact value depends on reference, configuration, condition, originality, service history, completeness and current demand. This is editorial guidance, not a purchase offer or investment advice.
Model story.
The so-called CasiOak combines a thin octagonal case with G-Shock durability and broad colour variety. It represents a distinct part of Casio’s broader approach to practical, affordable and technology-led watchmaking.
Movement
Quartz analog-digital module
Water resistance
200 metres
Production status
Current or reference dependent
Collector note
Condition, originality, module functionality and complete accessories influence desirability.
Buyer guide.
Test all functions, buttons, display segments, backlight, solar charging where applicable, bracelet or strap and water-resistance seals.
TimeHunter Insight
The so-called CasiOak combines a thin octagonal case with G-Shock durability and broad colour variety.