Side by side
Lum-Tec 39mm Combat B74 GMTvsSeiko Prospex SPEEDTIMER Mechanical
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
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At a glance
12 of 29 specs differDiameter
39mm Combat B74 GMT39mm
Prospex SPEEDTIMER Mechanical39.5mm
Power Reserve
39mm Combat B74 GMT—
Prospex SPEEDTIMER Mechanical72h
Water Resistance
39mm Combat B74 GMT200m
Prospex SPEEDTIMER Mechanical200m
MSRP
39mm Combat B74 GMT$931
Prospex SPEEDTIMER Mechanical$995
Full specifications
Case
4 specsCategory
—
Chronograph
Diameter
39mm
39.5mm
Thickness
0mm
12mm
Lug-to-Lug
46mm
44.5mm
Crystal & Dial
4 specsCrystal Shape
—
Curved
AR Coating
—
Anti-reflective coating on inner surface
Dial Color
—
—
Lume
None
LumiBrite on hands and index(es)
Movement
3 specsCaliber
Miyota 9075
Seiko 6R55
Power Reserve
0h
72h
Jewels
0
24
Pricing
1 specsMSRP
$931
$995
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