Side by side
Serica Ref. 5303 Diving ChronometervsSerket Watch Co Reef Mariana
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
12 of 29 specs differDiameter
Ref. 5303 Diving Chronometer39mm
Reef Mariana40mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Reef Mariana—
Water Resistance
Ref. 5303 Diving Chronometer300m
Reef Mariana200m
MSRP
Ref. 5303 Diving Chronometer$1,768
Reef Mariana$449
Full specifications
Case
5 specsCategory
Diver
—
Diameter
39mm
40mm
Thickness
12.2mm
13.2mm
Lug-to-Lug
46.5mm
47.5mm
Water Resistance
300m
200m
Crystal & Dial
3 specsAR Coating
Yes
Inner
Dial Color
Enamel Black
Orange
Lume
Super-LumiNova
BGW9
Movement
3 specsCaliber
M100 COSC
Seiko NH35
Power Reserve
42h
—
Complications
COSC
None
Pricing
1 specsMSRP
$1,768
$449
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