Side by side
Borealis Watch Co. Caloura 300mvsGrand Seiko SBGK006
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
The bottom line
The 39mm SBGK006 wears 3mm narrower than the 42mm Caloura 300m — that's a meaningful jump on most wrists.
Check prices & track
Borealis Watch Co. Caloura 300m
MSRP $275
Grand Seiko SBGK006
MSRP $22,200
At a glance
13 of 29 specs differDiameter
Caloura 300m42mm
SBGK00639mm
Power Reserve
Caloura 300m40h
SBGK00672h
Water Resistance
Caloura 300m300m
SBGK00630m
MSRP
Caloura 300m$275
SBGK006$22,200
Full specifications
Case
7 specsCategory
Diver
Dress
Diameter
42mm
39mm
Thickness
13.9mm
11.6mm
Lug-to-Lug
44.20mm
44mm
Lug Width
22mm
19mm
Material
Stainless Steel
Gold
Water Resistance
300m
30m
Crystal & Dial
2 specsAR Coating
Inner
Yes
Lume
BGW9
None
Movement
3 specsCaliber
NH35
9S63
Type
Automatic
Manual
Power Reserve
40h
72h
Pricing
1 specsMSRP
$275
$22,200
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