Side by side

Casio ECB-2300DvsCasio GM-B2100SD

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

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ECB-2300D
CasioECB-2300D
MSRP $280
See the full ECB-2300D
GM-B2100SD
CasioGM-B2100SD
MSRP $600
See the full GM-B2100SD
Buy from Casio ↗
Buy used on eBay ↗
Buy from Casio ↗
Buy used on eBay ↗

At a glance

7 of 29 specs differ
Diameter
ECB-2300D45.8mm
GM-B2100SD44.4mm
Power Reserve
ECB-2300D—
GM-B2100SD—
Water Resistance
ECB-2300D100m
GM-B2100SD200m
MSRP
ECB-2300D$280
GM-B2100SD$600

Full specifications

Case

5 specs
Category
Chronograph
Sport
Diameter
45.8mm
44.4mm
Thickness
10.9mm
12.8mm
Lug-to-Lug
50.2mm
49.8mm
Water Resistance
100m
200m

Crystal & Dial

1 specs
Dial Color
Blue
Black

Pricing

1 specs
MSRP
$280
$600
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