Side by side
Lum-Tec B64 ChronographvsGruppo Gamma Field III GMT
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
14 of 29 specs differDiameter
B64 Chronograph44mm
Field III GMT40mm
Power Reserve
B64 Chronograph40h
Field III GMT41h
Water Resistance
B64 Chronograph100m
Field III GMT200m
MSRP
B64 Chronograph$545
Field III GMT$459
Full specifications
Case
6 specsCategory
Chronograph
GMT
Diameter
44mm
40mm
Thickness
—
14mm
Lug-to-Lug
51.5mm
48.5mm
Material
Titanium (DLC coated)
Stainless Steel
Water Resistance
100m
200m
Crystal & Dial
4 specsCrystal
Domed Sapphire
Sapphire
AR Coating
Inner
Yes
Dial Color
Standard
Black
Lume
None
Super-LumiNova
Movement
3 specsCaliber
—
Seiko Instruments NH38A
Power Reserve
40h
41h
Complications
None
GMT
Pricing
1 specsMSRP
$545
$459
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