Side by side
Smiths Armstrong SiddeleyvsGruppo Gamma Field III GMT
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 GMT40mm
Power Reserve
Armstrong Siddeley—
Field III GMT41h
Water Resistance
Armstrong Siddeley100m
Field III GMT200m
MSRP
Armstrong Siddeley$980
Field III GMT$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
Pricing
1 specsMSRP
$980
$459
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