Side by side
Serica Ref. 5303 Diving ChronometervsBorealis Watch Co. Sea Storm MK2 GMT
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
Sea Storm MK2 GMT41.50mm
Power Reserve
Ref. 5303 Diving Chronometer42h
Sea Storm MK2 GMT40h
Water Resistance
Ref. 5303 Diving Chronometer300m
Sea Storm MK2 GMT300m
MSRP
Ref. 5303 Diving Chronometer$1,768
Sea Storm MK2 GMT$415
Full specifications
Case
4 specsDiameter
39mm
41.50mm
Thickness
12.2mm
14.15mm
Lug-to-Lug
46.5mm
48.50mm
Lug Width
20mm
20mm
Crystal & Dial
3 specsAR Coating
Yes
Inner
Dial Color
Enamel Black
Black
Lume
Super-LumiNova
BGW9
Movement
3 specsCaliber
M100 COSC
NH34
Power Reserve
42h
40h
Complications
COSC
None
Pricing
1 specsMSRP
$1,768
$415
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