Side by side
Serica Ref. 5303 Diving ChronometervsBorealis Watch Co. Caloura 300m
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
Caloura 300m42mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Caloura 300m40h
Water Resistance
Ref. 5303 Diving Chronometer300m
Caloura 300m300m
MSRP
Ref. 5303 Diving Chronometer$1,768
Caloura 300m$275
Full specifications
Case
4 specsDiameter
39mm
42mm
Thickness
12.2mm
13.9mm
Lug-to-Lug
46.5mm
44.20mm
Lug Width
20mm
22mm
Crystal & Dial
3 specsAR Coating
Yes
Inner
Dial Color
Enamel Black
Black
Lume
Super-LumiNova
BGW9
Movement
3 specsCaliber
M100 COSC
NH35
Power Reserve
42h
40h
Complications
COSC
None
Pricing
1 specsMSRP
$1,768
$275
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