Side by side
Seiko Prospex SeavsHemel HFC Mechanical Chronograph
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
15 of 29 specs differDiameter
Prospex Sea42mm
HFC Mechanical Chronograph40mm
Power Reserve
Prospex Sea72h
HFC Mechanical Chronograph40h
Water Resistance
Prospex Sea300m
HFC Mechanical Chronograph100m
MSRP
Prospex Sea—
HFC Mechanical Chronograph$550
Full specifications
Case
6 specsCategory
Diver
Chronograph
Diameter
42mm
40mm
Thickness
13.3mm
13.4mm
Lug-to-Lug
48.6mm
47mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
300m
100m
Crystal & Dial
4 specsCrystal
Sapphire
Domed Sapphire
AR Coating
Anti-reflective coating on inner surface
Inner
Dial Color
Black
Airfoil (1970s British Pilot)
Lume
LumiBrite on hands, index(es) and bezel
None
Movement
4 specsCaliber
6R54
Seagull ST19
Type
Automatic
Manual
Power Reserve
72h
40h
Jewels
24
25
Pricing
1 specsMSRP
—
$550
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