Side by side
Serica Ref. 5303 Diving ChronometervsSheffield 1A 38
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
1A 3838mm
Power Reserve
Ref. 5303 Diving Chronometer42h
1A 38—
Water Resistance
Ref. 5303 Diving Chronometer300m
1A 38200m
MSRP
Ref. 5303 Diving Chronometer$1,768
1A 38$238
Full specifications
Case
4 specsDiameter
39mm
38mm
Thickness
12.2mm
12.8mm
Lug-to-Lug
46.5mm
46mm
Water Resistance
300m
200m
Crystal & Dial
3 specsAR Coating
Yes
Inner
Dial Color
Enamel Black
Blue
Lume
Super-LumiNova
None
Movement
3 specsCaliber
M100 COSC
Seiko NH35
Power Reserve
42h
—
Complications
COSC
None
Pricing
1 specsMSRP
$1,768
$238
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