Side by side
Borealis Watch Co. Porto CovovsGrand Seiko STGF387
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
11 of 29 specs differDiameter
Porto Covo40mm
STGF38726mm
Power Reserve
Porto Covo40h
STGF38740h
Water Resistance
Porto Covo300m
STGF387100m
MSRP
Porto Covo$415
STGF387$4,200
Full specifications
Case
6 specsCategory
Diver
Dress
Diameter
40mm
26mm
Thickness
11.6mm
8.1mm
Lug-to-Lug
42.5mm
32.9mm
Lug Width
20mm
13mm
Water Resistance
300m
100m
Crystal & Dial
2 specsAR Coating
Inner
Yes
Lume
BGW9
None
Movement
2 specsCaliber
Miyota 9039
4J51
Type
Automatic
Quartz
Pricing
1 specsMSRP
$415
$4,200
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