Side by side
Serket Watch Co Reef XvsSeiko Prospex Sea
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
11 of 29 specs differDiameter
Reef X42.5mm
Prospex Sea43.8mm
Power Reserve
Reef X40h
Prospex Sea41h
Water Resistance
Reef X200m
Prospex Sea200m
MSRP
Reef X$399
Prospex Sea$625
Full specifications
Case
4 specsCategory
—
Diver
Diameter
42.5mm
43.8mm
Thickness
12.7mm
12.8mm
Lug-to-Lug
49mm
48.7mm
Crystal & Dial
3 specsAR Coating
Inner
Anti-reflective coating on inner surface
Dial Color
Yellow
Black
Lume
None
LumiBrite on hands, index(es) and bezel
Movement
3 specsCaliber
Miyota 8215
4R35
Power Reserve
40h
41h
Jewels
25
23
Pricing
1 specsMSRP
$399
$625
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