Side by side
Borealis Watch Co. Sea Storm MK2 GMTvsTudor Black Bay 58 GMT
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
19 of 29 specs differDiameter
Sea Storm MK2 GMT41.50mm
Black Bay 58 GMT39mm
Power Reserve
Sea Storm MK2 GMT40h
Black Bay 58 GMT65h
Water Resistance
Sea Storm MK2 GMT300m
Black Bay 58 GMT200m
MSRP
Sea Storm MK2 GMT$415
Black Bay 58 GMT$5,525
Full specifications
Case
8 specsCategory
Diver
GMT
Diameter
41.50mm
39mm
Thickness
14.15mm
12.8mm
Lug-to-Lug
48.50mm
—
Lug Width
20mm
12.8mm
Finish
Brushed and polished
Polished + Satin
Water Resistance
300m
200m
Caseback
Solid
Solid screw-down
Crystal & Dial
3 specsCrystal Shape
Flat
—
AR Coating
Inner
—
Lume
BGW9
None
Movement
7 specsCaliber
NH34
MT5450-U
Beat Rate
28,800 vph
0 vph
Power Reserve
40h
65h
Jewels
25
0
Hacking
Yes
No
Hand-winding
Yes
No
Complications
None
GMT
Pricing
1 specsMSRP
$415
$5,525
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