Side by side
Casio GBM-2100AvsNorthern Star Watch Sentinel
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
15 of 29 specs differDiameter
GBM-2100A44.4mm
Sentinel40.5mm
Power Reserve
GBM-2100A—
Sentinel42h
Water Resistance
GBM-2100A200m
Sentinel50m
MSRP
GBM-2100A$280
Sentinel$649
Full specifications
Case
8 specsCategory
Sport
—
Diameter
44.4mm
40.5mm
Thickness
11.9mm
10.1mm
Lug-to-Lug
49.3mm
43.72mm
Lug Width
—
20mm
Material
Bio-based Resin / Stainless steel
Stainless Steel
Finish
—
—
Water Resistance
200m
50m
Crystal & Dial
3 specsCrystal
Mineral
Sapphire
AR Coating
No
—
Dial Color
Silver
White
Movement
3 specsCaliber
—
Miyota 90S5
Type
Quartz
Automatic
Power Reserve
—
42h
Pricing
1 specsMSRP
$280
$649
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