Side by side
Serket Watch Co Reef MarianavsSeiko Prospex Sea 1968 Heritage Diver's GMT Watch
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
12 of 29 specs differDiameter
Reef Mariana40mm
Prospex Sea 1968 Heritage Diver's GMT Watch42mm
Power Reserve
Reef Mariana—
Prospex Sea 1968 Heritage Diver's GMT Watch72h
Water Resistance
Reef Mariana200m
Prospex Sea 1968 Heritage Diver's GMT Watch300m
MSRP
Reef Mariana$449
Prospex Sea 1968 Heritage Diver's GMT Watch$1,700
Full specifications
Case
5 specsCategory
—
Diver
Diameter
40mm
42mm
Thickness
13.2mm
13.3mm
Lug-to-Lug
47.5mm
48.6mm
Water Resistance
200m
300m
Crystal & Dial
3 specsAR Coating
Inner
Anti-reflective coating on inner surface
Dial Color
Orange
Black
Lume
BGW9
LumiBrite on hands, index(es) and bezel
Movement
3 specsCaliber
Seiko NH35
6R54
Power Reserve
—
72h
Jewels
25
24
Pricing
1 specsMSRP
$449
$1,700
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