Side by side
Castor Watches KOI DARKvsSlow Watches Slow Round 40mm
The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.
At a glance
9 of 29 specs differDiameter
KOI DARK38mm
Slow Round 40mm42.5mm
Power Reserve
KOI DARK—
Slow Round 40mm—
Water Resistance
KOI DARK50m
Slow Round 40mm100m
MSRP
KOI DARK—
Slow Round 40mm—
Full specifications
Case
6 specsDiameter
38mm
42.5mm
Thickness
7mm
8.25mm
Lug-to-Lug
—
46mm
Lug Width
18mm
—
Material
316L Stainless Steel
Stainless Steel
Water Resistance
50m
100m
Crystal & Dial
2 specsCrystal
Mineral
Sapphire
Dial Color
Copper
—
Movement
1 specsCaliber
Miyota 2035
Ronda 515.24
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