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Aigi Watches POLAR DAY 40MMvsGrand Seiko STGF387

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

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POLAR DAY 40MM
Aigi WatchesPOLAR DAY 40MM
MSRP $179
STGF387
Grand SeikoSTGF387
MSRP $4,200
Buy from Aigi Watches ↗
Buy used on eBay ↗
Buy from Grand Seiko ↗
Buy used on eBay ↗

At a glance

10 of 29 specs differ
Diameter
POLAR DAY 40MM40mm
STGF38726mm
Power Reserve
POLAR DAY 40MM40h
STGF38740h
Water Resistance
POLAR DAY 40MM50m
STGF387100m
MSRP
POLAR DAY 40MM$179
STGF387$4,200

Full specifications

Case

6 specs
Category
—
Dress
Diameter
40mm
26mm
Thickness
6.6mm
8.1mm
Lug-to-Lug
46mm
32.9mm
Lug Width
20mm
13mm
Water Resistance
50m
100m

Crystal & Dial

2 specs
AR Coating
Inner
Yes
Dial Color
—
Black

Movement

1 specs
Caliber
Miyota
4J51

Pricing

1 specs
MSRP
$179
$4,200
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