Side by side
Serica Ref. 5303 Diving ChronometervsS.U.F Helsinki 180 Protox
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
180 Protox38.7mm
Power Reserve
Ref. 5303 Diving Chronometer42h
180 Protox42h
Water Resistance
Ref. 5303 Diving Chronometer300m
180 Protox100m
MSRP
Ref. 5303 Diving Chronometer$1,768
180 Protox$2,588
Full specifications
Case
6 specsCategory
Diver
—
Diameter
39mm
38.7mm
Thickness
12.2mm
9.4mm
Lug-to-Lug
46.5mm
46.4mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
300m
100m
Crystal & Dial
3 specsAR Coating
Yes
Inner
Dial Color
Enamel Black
Black
Lume
Super-LumiNova
None
Movement
2 specsCaliber
M100 COSC
Soprod A10
Complications
COSC
None
Pricing
1 specsMSRP
$1,768
—
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