Side by side
Hemel HD24 AutomaticvsSeiko Prospex SPEEDTIMER
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
15 of 29 specs differDiameter
HD24 Automatic40mm
Prospex SPEEDTIMER42.5mm
Power Reserve
HD24 Automatic40h
Prospex SPEEDTIMER45h
Water Resistance
HD24 Automatic200m
Prospex SPEEDTIMER100m
MSRP
HD24 Automatic$300
Prospex SPEEDTIMER$3,000
Full specifications
Case
6 specsCategory
Diver
Chronograph
Diameter
40mm
42.5mm
Thickness
13mm
15.1mm
Lug-to-Lug
48mm
50mm
Material
316L Stainless Steel
Stainless Steel
Water Resistance
200m
100m
Crystal & Dial
5 specsCrystal
Domed Sapphire
Sapphire
Crystal Shape
Flat
Curved
AR Coating
Inner
Anti-reflective coating on inner surface
Dial Color
Gallant USAF Edition
Black
Lume
None
LumiBrite on hands and index(es)
Movement
3 specsCaliber
Seiko NH38A
8R46
Power Reserve
40h
45h
Jewels
25
34
Pricing
1 specsMSRP
$300
$3,000
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