Side by side
Alexander James Watches A3 OmenvsSeiko Prospex SPEEDTIMER Mechanical Chronograph
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
12 of 29 specs differDiameter
A3 Omen38mm
Prospex SPEEDTIMER Mechanical Chronograph42mm
Power Reserve
A3 Omen40h
Prospex SPEEDTIMER Mechanical Chronograph45h
Water Resistance
A3 Omen100m
Prospex SPEEDTIMER Mechanical Chronograph100m
MSRP
A3 Omen$650
Prospex SPEEDTIMER Mechanical Chronograph$2,500
Full specifications
Case
4 specsCategory
—
Chronograph
Diameter
38mm
42mm
Thickness
10.4mm
14.6mm
Lug-to-Lug
46mm
49.5mm
Crystal & Dial
4 specsCrystal Shape
Flat
Curved
AR Coating
Inner
Anti-reflective coating on inner surface
Dial Color
—
Black
Lume
None
LumiBrite on hands and index(es)
Movement
3 specsCaliber
Miyota 9039
8R48
Power Reserve
40h
45h
Jewels
25
34
Pricing
1 specsMSRP
$650
$2,500
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