Side by side
Casio GM-B2100SDvsOblvlo GCM Mechanical
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
15 of 29 specs differDiameter
GM-B2100SD44.4mm
GCM Mechanical41mm
Power Reserve
GM-B2100SD—
GCM Mechanical42h
Water Resistance
GM-B2100SD200m
GCM Mechanical50m
MSRP
GM-B2100SD$600
GCM Mechanical$231
Full specifications
Case
6 specsDiameter
44.4mm
41mm
Thickness
12.8mm
12mm
Lug-to-Lug
49.8mm
0mm
Lug Width
—
21mm
Finish
—
—
Water Resistance
200m
50m
Crystal & Dial
4 specsCrystal
Mineral
Sapphire
AR Coating
No
—
Dial Color
Black
—
Lume
None
Super-LumiNova
Movement
4 specsCaliber
—
Miyota 82S5
Type
Quartz
Automatic
Power Reserve
—
42h
Jewels
0
25
Pricing
1 specsMSRP
$600
$231
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