Side by side
Castor Watches KOI DARKvsGrand Seiko SBGR321
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
14 of 29 specs differDiameter
KOI DARK38mm
SBGR32140mm
Power Reserve
KOI DARK—
SBGR32172h
Water Resistance
KOI DARK50m
SBGR321100m
MSRP
KOI DARK—
SBGR321$5,200
Full specifications
Case
7 specsCategory
—
Dress
Diameter
38mm
40mm
Thickness
7mm
13mm
Lug-to-Lug
—
46.6mm
Lug Width
18mm
20mm
Material
316L Stainless Steel
Stainless Steel
Water Resistance
50m
100m
Crystal & Dial
3 specsCrystal
Mineral
Sapphire
AR Coating
Inner
Yes
Dial Color
Copper
Black
Movement
3 specsCaliber
Miyota 2035
9S65
Type
Quartz
Automatic
Power Reserve
—
72h
Pricing
1 specsMSRP
—
$5,200
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