Side by side
Serica Ref. 5303 Diving ChronometervsOblvlo JM Rotor
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
13 of 29 specs differDiameter
Ref. 5303 Diving Chronometer39mm
JM Rotor42mm
Power Reserve
Ref. 5303 Diving Chronometer42h
JM Rotor42h
Water Resistance
Ref. 5303 Diving Chronometer300m
JM Rotor50m
MSRP
Ref. 5303 Diving Chronometer$1,768
JM Rotor$299
Full specifications
Case
5 specsCategory
Diver
Sport
Diameter
39mm
42mm
Thickness
12.2mm
13mm
Lug-to-Lug
46.5mm
46mm
Water Resistance
300m
50m
Crystal & Dial
3 specsAR Coating
Yes
Inner
Dial Color
Enamel Black
Black
Lume
Super-LumiNova
None
Movement
4 specsCaliber
M100 COSC
Miyota 8215
Power Reserve
42h
42h
Jewels
25
21
Complications
COSC
None
Pricing
1 specsMSRP
$1,768
$299
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