Side by side
Borealis Watch Co. Sea Storm MK2 GMTvsSeiko Astron
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
13 of 29 specs differDiameter
Sea Storm MK2 GMT41.50mm
Astron42mm
Power Reserve
Sea Storm MK2 GMT40h
Astron40h
Water Resistance
Sea Storm MK2 GMT300m
Astron100m
MSRP
Sea Storm MK2 GMT$415
Astron$2,500
Full specifications
Case
7 specsCategory
Diver
GMT
Diameter
41.50mm
42mm
Thickness
14.15mm
12.4mm
Lug-to-Lug
48.50mm
49.5mm
Lug Width
20mm
14mm
Material
Stainless Steel
Titanium
Water Resistance
300m
100m
Crystal & Dial
2 specsAR Coating
Inner
Super-clear coating
Lume
BGW9
LumiBrite on hands and index(es)
Movement
3 specsCaliber
NH34
5X83
Type
Automatic
Quartz
Jewels
25
14
Pricing
1 specsMSRP
$415
$2,500
Follow this matchup
Get a note when Borealis Watch Co. Sea Storm MK2 GMT vs Seiko Astron gets more votes, a community discussion, or a price drop. No account needed.
More watches worth a look
Matched to the watches above on size, movement, style and price — microbrands first. Open any one to dig in.
People also compared
Comparisons nearby in the catalog — alternatives to the watches above paired against the matchup.