Side by side
Seiko Prospex SPEEDTIMER Mechanical ChronographvsWolbrook JetFlyer Automatic 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
Prospex SPEEDTIMER Mechanical Chronograph42mm
JetFlyer Automatic Chronograph38mm
Power Reserve
Prospex SPEEDTIMER Mechanical Chronograph45h
JetFlyer Automatic Chronograph40h
Water Resistance
Prospex SPEEDTIMER Mechanical Chronograph100m
JetFlyer Automatic Chronograph100m
MSRP
Prospex SPEEDTIMER Mechanical Chronograph$2,500
JetFlyer Automatic Chronograph$845
Full specifications
Case
4 specsDiameter
42mm
38mm
Thickness
14.6mm
12.1mm
Lug-to-Lug
49.5mm
46mm
Material
Stainless Steel
316L Stainless Steel
Crystal & Dial
4 specsCrystal
Sapphire
Domed Sapphire
Crystal Shape
Curved
Flat
AR Coating
Anti-reflective coating on inner surface
Inner
Lume
LumiBrite on hands and index(es)
None
Movement
3 specsCaliber
8R48
—
Power Reserve
45h
40h
Jewels
34
25
Pricing
1 specsMSRP
$2,500
$845
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