Side by side
Borealis Watch Co. JamantavsGrand Seiko SBGA427
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
12 of 29 specs differDiameter
Jamanta42.50mm
SBGA42739mm
Power Reserve
Jamanta40h
SBGA42772h
Water Resistance
Jamanta300m
SBGA427100m
MSRP
Jamanta$415
SBGA427$5,800
Full specifications
Case
6 specsCategory
Diver
Dress
Diameter
42.50mm
39mm
Thickness
13.30mm
12.3mm
Lug-to-Lug
50.40mm
46.8mm
Lug Width
22mm
19mm
Water Resistance
300m
100m
Crystal & Dial
2 specsAR Coating
Inner
Yes
Lume
BGW9
None
Movement
3 specsCaliber
Miyota 9015
9R65
Type
Automatic
Spring Drive
Power Reserve
40h
72h
Pricing
1 specsMSRP
$415
$5,800
More watches worth a look
Matched to the watches above on size, movement, style and price — microbrands first. Open any one to dig in.
Follow this matchup
Get a note when Borealis Watch Co. Jamanta vs Grand Seiko SBGA427 gets more votes, a community discussion, or a price drop. No account needed.
People also compared
Comparisons nearby in the catalog — alternatives to the watches above paired against the matchup.
Grand Seiko SBGA427vsZelos Great White 43Phoibos Apollo TitaniumvsGrand Seiko SBGA427Phoibos Great WallvsGrand Seiko SBGA427Grand Seiko SBGA427vsZelos Thresher 44Borealis Watch Co. JamantavsCincinnati Watch Company The Cincinnatian - Sold Out. Discontinued. LegacyBorealis Watch Co. JamantavsYema Wristmaster Slim Small Seconds CMM.29