Side by side
Monbrey T4 - BlackvsSeiko 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
13 of 29 specs differDiameter
T4 - Black37.5mm
Prospex SPEEDTIMER Mechanical39.5mm
Power Reserve
T4 - Black—
Prospex SPEEDTIMER Mechanical72h
Water Resistance
T4 - Black100m
Prospex SPEEDTIMER Mechanical200m
MSRP
T4 - Black$659
Prospex SPEEDTIMER Mechanical$995
Full specifications
Case
5 specsCategory
—
Chronograph
Diameter
37.5mm
39.5mm
Thickness
0mm
12mm
Lug-to-Lug
0mm
44.5mm
Water Resistance
100m
200m
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
Monbrey Cal. 5621
Seiko 6R55
Power Reserve
0h
72h
Jewels
0
24
Pricing
1 specsMSRP
$659
$995
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