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Castor Watches KOI DARKvsGrand Seiko SBGX355

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

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KOI DARK
Castor WatchesKOI DARK
SBGX355
Grand SeikoSBGX355
MSRP $4,100
Buy from Castor Watches ↗
Buy used on eBay ↗
Buy from Grand Seiko ↗
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At a glance

13 of 29 specs differ
Diameter
KOI DARK38mm
SBGX35537mm
Power Reserve
KOI DARK—
SBGX35540h
Water Resistance
KOI DARK50m
SBGX355100m
MSRP
KOI DARK—
SBGX355$4,100

Full specifications

Case

7 specs
Category
—
Dress
Diameter
38mm
37mm
Thickness
7mm
10.6mm
Lug-to-Lug
—
44.6mm
Lug Width
18mm
19mm
Material
316L Stainless Steel
Titanium
Water Resistance
50m
100m

Crystal & Dial

3 specs
Crystal
Mineral
Sapphire
AR Coating
Inner
Yes
Dial Color
Copper
Black

Movement

2 specs
Caliber
Miyota 2035
9F62
Power Reserve
—
40h

Pricing

1 specs
MSRP
—
$4,100
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