Side by side
Borealis Watch Co. Caloura 300mvsGrand Seiko SBGW257
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
13 of 29 specs differDiameter
Caloura 300m42mm
SBGW25738mm
Power Reserve
Caloura 300m40h
SBGW25772h
Water Resistance
Caloura 300m300m
SBGW25730m
MSRP
Caloura 300m$275
SBGW257$38,000
Full specifications
Case
7 specsCategory
Diver
Dress
Diameter
42mm
38mm
Thickness
13.9mm
10.9mm
Lug-to-Lug
44.20mm
45.8mm
Lug Width
22mm
19mm
Material
Stainless Steel
Platinum
Water Resistance
300m
30m
Crystal & Dial
2 specsAR Coating
Inner
Yes
Lume
BGW9
None
Movement
3 specsCaliber
NH35
9S64
Type
Automatic
Manual
Power Reserve
40h
72h
Pricing
1 specsMSRP
$275
$38,000
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