Side by side
Smiths Armstrong SiddeleyvsGruppo Gamma Field III GMT Date
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
13 of 29 specs differDiameter
Armstrong Siddeley42mm
Field III GMT Date40mm
Power Reserve
Armstrong Siddeley—
Field III GMT Date41h
Water Resistance
Armstrong Siddeley100m
Field III GMT Date200m
MSRP
Armstrong Siddeley$980
Field III GMT Date$459
Full specifications
Case
5 specsCategory
—
GMT
Diameter
42mm
40mm
Thickness
12mm
14mm
Lug-to-Lug
52mm
48.5mm
Water Resistance
100m
200m
Crystal & Dial
3 specsAR Coating
Inner
Yes
Dial Color
Cream
Black
Lume
None
Super-LumiNova
Movement
4 specsCaliber
Unitas 6498
Seiko Instruments NH38A
Type
Manual
Automatic
Power Reserve
—
41h
Complications
None
GMT, Date
Pricing
1 specsMSRP
$980
$459
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