Side by side
Serket Watch Co Reef MarianavsSinn U18
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
17 of 29 specs differDiameter
Reef Mariana40mm
U1844mm
Power Reserve
Reef Mariana—
U1842h
Water Resistance
Reef Mariana200m
U182,000m
MSRP
Reef Mariana$449
U18$3,488
Full specifications
Case
9 specsCategory
—
Diver
Diameter
40mm
44mm
Thickness
13.2mm
15.5mm
Lug-to-Lug
47.5mm
—
Lug Width
20mm
22mm
Material
Stainless Steel
high-strength
Finish
Brushed and polished
—
Water Resistance
200m
2000m
Caseback
Solid
—
Crystal & Dial
5 specsCrystal Shape
Flat
—
AR Coating
Inner
—
Dial Color
Orange
Black
Indices
Applied
—
Lume
BGW9
None
Movement
2 specsCaliber
Seiko NH35
SW300-1
Power Reserve
—
42h
Pricing
1 specsMSRP
$449
$3,488
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