Side by side
Serica Ref. 5303 Diving ChronometervsSugess Ocean Star S421
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
11 of 29 specs differDiameter
Ref. 5303 Diving Chronometer39mm
Ocean Star S42140mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Ocean Star S42140h
Water Resistance
Ref. 5303 Diving Chronometer300m
Ocean Star S421300m
MSRP
Ref. 5303 Diving Chronometer$1,768
Ocean Star S421$449
Full specifications
Case
3 specsDiameter
39mm
40mm
Thickness
12.2mm
12.7mm
Lug-to-Lug
46.5mm
46mm
Crystal & Dial
3 specsAR Coating
Yes
Inner
Dial Color
Enamel Black
SU116610LB Black
Lume
Super-LumiNova
None
Movement
4 specsCaliber
M100 COSC
Seagull ST2130/Seiko NH35
Beat Rate
28,800 vph
4 vph
Power Reserve
42h
40h
Complications
COSC
GMT, Chronograph, Moonphase, Date
Pricing
1 specsMSRP
$1,768
$449
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