Side by side
Alexander James Watches A4 Prelude 37 GMTvsGruppo Gamma Field III GMT Date
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
12 of 29 specs differDiameter
A4 Prelude 37 GMT37.4mm
Field III GMT Date40mm
Power Reserve
A4 Prelude 37 GMT—
Field III GMT Date41h
Water Resistance
A4 Prelude 37 GMT200m
Field III GMT Date200m
MSRP
A4 Prelude 37 GMT—
Field III GMT Date$459
Full specifications
Case
5 specsCategory
—
GMT
Diameter
37.4mm
40mm
Thickness
12.1mm
14mm
Lug-to-Lug
44.7mm
48.5mm
Lug Width
20mm
22mm
Crystal & Dial
3 specsAR Coating
Inner
Yes
Dial Color
White
Black
Lume
BGW9
Super-LumiNova
Movement
3 specsCaliber
Seiko NH34
Seiko Instruments NH38A
Power Reserve
—
41h
Complications
None
GMT, Date
Pricing
1 specsMSRP
—
$459
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