Side by side

Castor Watches KOI DARKvsSlow Watches Solar

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
Solar
Slow WatchesSolar
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At a glance

8 of 29 specs differ
Diameter
KOI DARK38mm
Solar40mm
Power Reserve
KOI DARK—
Solar—
Water Resistance
KOI DARK50m
Solar50m
MSRP
KOI DARK—
Solar—

Full specifications

Case

4 specs
Diameter
38mm
40mm
Thickness
7mm
10mm
Lug Width
18mm
—
Material
316L Stainless Steel
Aluminum

Crystal & Dial

2 specs
Crystal
Mineral
Sapphire
Dial Color
Copper
White

Movement

2 specs
Caliber
Miyota 2035
VS42A
Type
Quartz
Solar
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