Casio GM-B2100SD
Ref. GM-B2100SD · Sport
$600Stock unknown
Case
- Diameter
- 44.4mm
- Thickness
- 12.8mm
- Lug-to-lug
- 49.8mm
- Material
- Stainless Steel
- Water resistance
- 200m
Crystal & dial
- Crystal
- Mineral
- Dial colour
- Black
Movement
- Type
- Quartz
Design language
- Case shape
- round
- Dial style
- matte
- Sub-dials
- 1
- Bezel
- fixed
- Bracelet
- lug-attached
- Hands
- baton
AI-detected from the product image
G-Shock collection · 101 watches
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-B2100GA-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-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
The market
Market prices.
Retail$600
eBay listings
- CASIO G-SHOCK GM-B2100SD-1AJF Tough Solar Bluetooth Full Metal Black Men's WatchPre-owned - Excellent · JP$363
- CASIO G-SHOCK GM-B2100SD-1CJF Stainless Steel Black Solar Quartz Men's WatchPre-owned - Good · JP$366
- Casio G-SHOCK GM-B2100SD-1AJF Full Metal Solar Analog-Digital Watch Wrist 15cmPre-owned - Good · JP$372
Lowest displayed prices first.
Matched listings from our latest checks; eBay may show additional results. We may earn a commission through these links at no extra cost to you.
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 →The connection engine
More like this.
The community take
Owners talk.
Owners widely praise the Casio GM-B2100SD for its elevated metal aesthetic and satisfying heft, with some finding its silver colorway offers improved visibility and its indices matching the bezel and bracelet enhances legibility. The Bluetooth connectivity is noted as a convenient feature for setting alarms and other functions. However, the mineral crystal is a point of contention for some, and the lume performance is described as not great or subtle, with one owner finding the hands not very legible. The watch is considered a beautiful and versatile starting point for a G-Shock, wearing like a normal watch, though its $600 price point for a G-Shock is questioned by one potential buyer. On balance, owners and reviewers appreciate the Casio GM-B2100SD for its refined full-metal design and convenient smart features, despite some reservations about its crystal and lume.
Open the discussion
On real wrists · 1
The paper trail
The discussion