Side by side
Aigi Watches NORTHERN LIGHTS 40MMvsCastor Watches KOI DARK
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
10 of 29 specs differDiameter
NORTHERN LIGHTS 40MM40mm
KOI DARK38mm
Power Reserve
NORTHERN LIGHTS 40MM40h
KOI DARK—
Water Resistance
NORTHERN LIGHTS 40MM50m
KOI DARK50m
MSRP
NORTHERN LIGHTS 40MM$179
KOI DARK—
Full specifications
Case
5 specsDiameter
40mm
38mm
Thickness
7.2mm
7mm
Lug-to-Lug
46mm
—
Lug Width
20mm
18mm
Material
Stainless Steel
316L Stainless Steel
Crystal & Dial
2 specsCrystal
Sapphire
Mineral
Dial Color
—
Copper
Movement
2 specsCaliber
CITIZEN-MIYOTA
Miyota 2035
Power Reserve
40h
—
Pricing
1 specsMSRP
$179
—
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