Side by side
Borealis Watch Co. Caloura 300mvsGrand Seiko SBGZ003
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
The bottom line
The 38.5mm SBGZ003 wears 3.5mm 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 SBGZ003
At a glance
13 of 29 specs differDiameter
Caloura 300m42mm
SBGZ00338.5mm
Power Reserve
Caloura 300m40h
SBGZ00384h
Water Resistance
Caloura 300m300m
SBGZ00330m
MSRP
Caloura 300m$275
SBGZ003—
Full specifications
Case
7 specsCategory
Diver
Dress
Diameter
42mm
38.5mm
Thickness
13.9mm
9.8mm
Lug-to-Lug
44.20mm
43.7mm
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
9R02
Type
Automatic
Spring Drive
Power Reserve
40h
84h
Pricing
1 specsMSRP
$275
—
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