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Home/Browse/Casio/GA-B2100
SpecStudio
Casio GA-B2100
Click to inspect
Casio · G-Shock

Casio GA-B2100

Ref. GA-B2100 · Sport

$165Stock unknown

514 matched eBay listings

Case

Diameter
45.4mm
Thickness
11.9mm
Lug-to-lug
48.5mm
Material
Carbon / Bio-based resin
Water resistance
200m

Crystal & dial

Crystal
Mineral
Dial colour
Black

Movement

Type
Quartz

Design language

Case shape
octagonal
Dial style
matte
Bezel
fixed
Bracelet
rubber
Hands
baton

AI-detected from the product image

G-Shock collection · 101 watches

AWG-M100
AWG-M10046.4mm
DW-5000R
DW-5000R42.3mm
DW-5040RX-7
DW-5040RX-742.8mm
DW-5600
DW-560042.8mm
DW-5610
DW-561043.8mm
DW-5900
DW-590046.8mm
DW-6600
DW-660050mm
DW-6900
DW-690050mm
DW-9052
DW-905243mm
DW-9052GBX
DW-9052GBX46.5mm
DW-B5600
DW-B560042.8mm
DW-H5600
DW-H560044.5mm
88 more in this collection
DWE-5600JBG-5600G-7900G-8900G-SHOCK G-STEEL GST-B500G-Shock GW-M5610GA-010GA-100GA-1000GA-110GA-1100GA-2000GA-2100GA-2110GA-2140GA-2200GA-400GBGA-700GA-710GBGA-800GA-900GA-B001GA-B010GA-V01GAS-100GBA-800UCGBA-900GBA-950GBD-200GBD-800GBD-H1000GBD-H2000GBM-2100AGBX-100GBX-H5600GD-010GD-100GD-120CMGD-350GD-400GD-B500GG-1000GG-B100XMGLX-5600KBGM-110GM-2100GM-2110DGM-5600GM-6900GM-700GGM-B2100SDGM-H5600GM-S2110GM-S5600PGGMA-P2100GMA-P2126WGMA-S110XGGMA-S120MFGMA-S140GMA-S2100GMD-B300GMD-S5610BBGMW-B5000GMW-BZ5000GDGPR-H1000GR-B300GST-B100GST-B1000DGST-B400GST-S100GGW-2310UGW-2320FPGW-5000HSGW-6900UGW-7900GW-9400GW-9500GW-B5600GW-M500AGW-M530AGWF-A1000GWF-D1000GWG-B1000GX-56BBRMRG-B2000MRG-B5000MTG-B2000MTG-B3000

2 colorways

Alternatives

01The market

Market prices.

Retail$165

The forum market

See what sellers are asking.

Active listings1Across watch forums
Closed · 30d2Asking-price history

Browse forum listings and their asking prices. Market+ adds the weekly trend.

Retail stock & market context

Casio on the secondhand market

+10.5%

2026 so far · +1.3% to +21.6% · 47 matched watches

In line with the index

Year-by-year readings →

02The connection engine

More like this.

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Casio G-Shock GW-M5610

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G-Shock GW-M5610

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Rockwell Time CF Leather

Rockwell Time

CF Leather

45mm · Quartz$320

Casio W-218H

Casio

W-218H

43.2mm · Quartz$30

Briston Streamliner Kennedy - Chrono

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Streamliner Kennedy - Chrono

38.5mm · Quartz$595

Slow Watches Mo

Slow Watches

Mo

34mm · Quartz$319

View all alternatives

03The community take

Owners talk.

“

Owners widely praise the Casio GA-B2100 for its "Casioak design," solar charging, and Bluetooth connectivity, with many calling it the best in its series for its legible dial, slim and comfortable fit, and solid build quality. The dial features a nice sheen that conceals solar cells, sharp text, and a colorful, useful red indicator hand, while the hands have good lume, though markers lack it. One owner notes the 45.5mm width is well-designed with a symmetrical look due to the lack of a crown. Some owners report issues with charging not progressing past M, failure to time sync automatically for extended periods, or a misaligned mode hand. One owner feels the Casio GA-B2100 is functionally unimpressive for its $130 price point. Overall, owners rate the Casio GA-B2100 highly for its combination of iconic design, solar charging, and Bluetooth utility.

Synthesized from 10 sources
Reddit·8↗
WatchCrunch·2↗
Open the discussion

On real wrists · 1

04The paper trail

Ask the communityStart a discussion about the GA-B2100: get takes from other collectors.Ask →

05The discussion

Talk about the Casio GA-B2100.