Side by side
Swatch Am51vsGruppo Gamma Field III GMT
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
17 of 29 specs differDiameter
Am5142mm
Field III GMT40mm
Power Reserve
Am51—
Field III GMT41h
Water Resistance
Am5130m
Field III GMT200m
MSRP
Am51$170
Field III GMT$459
Full specifications
Case
8 specsCategory
Mechanical
GMT
Diameter
42mm
40mm
Thickness
13.9mm
14mm
Lug-to-Lug
50.6mm
48.5mm
Lug Width
—
22mm
Material
Bio-sourced Material
Stainless Steel
Finish
Bio-sourced material
—
Water Resistance
30m
200m
Crystal & Dial
3 specsCrystal
—
Sapphire
AR Coating
—
Yes
Lume
None
Super-LumiNova
Movement
5 specsCaliber
—
Seiko Instruments NH38A
Power Reserve
0h
41h
Hacking
Yes
No
Hand-winding
Yes
No
Complications
None
GMT
Pricing
1 specsMSRP
$170
$459
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