Side by side
Serica Ref. 5303 Diving ChronometervsSerket Watch Co Reef
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
Reef46mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Reef38h
Water Resistance
Ref. 5303 Diving Chronometer300m
Reef300m
MSRP
Ref. 5303 Diving Chronometer$1,768
Reef$899
Full specifications
Case
5 specsCategory
Diver
—
Diameter
39mm
46mm
Thickness
12.2mm
14mm
Lug-to-Lug
46.5mm
52mm
Lug Width
20mm
24mm
Crystal & Dial
3 specsAR Coating
Yes
Inner
Dial Color
Enamel Black
Black
Lume
Super-LumiNova
None
Movement
3 specsCaliber
M100 COSC
Sellita SW200-1
Power Reserve
42h
38h
Complications
COSC
None
Pricing
1 specsMSRP
$1,768
$899
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