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Castor Watches KOI DARKvsSeiko Prospex SPEEDTIMER Seiko Brand 100th Anniversary SPEEDTIMER Limited Edition

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
Prospex SPEEDTIMER Seiko Brand 100th Anniversary SPEEDTIMER Limited Edition
SeikoProspex SPEEDTIMER Seiko Brand 100th Anniversary SPEEDTIMER Limited Edition
MSRP $2,400
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At a glance

16 of 29 specs differ
Diameter
KOI DARK38mm
Prospex SPEEDTIMER Seiko Brand 100th Anniversary SPEEDTIMER Limited Edition42mm
Power Reserve
KOI DARK—
Prospex SPEEDTIMER Seiko Brand 100th Anniversary SPEEDTIMER Limited Edition40h
Water Resistance
KOI DARK50m
Prospex SPEEDTIMER Seiko Brand 100th Anniversary SPEEDTIMER Limited Edition100m
MSRP
KOI DARK—
Prospex SPEEDTIMER Seiko Brand 100th Anniversary SPEEDTIMER Limited Edition$2,400

Full specifications

Case

7 specs
Category
—
Chronograph
Diameter
38mm
42mm
Thickness
7mm
12.9mm
Lug-to-Lug
—
49.6mm
Lug Width
18mm
20mm
Material
316L Stainless Steel
Stainless Steel
Water Resistance
50m
100m

Crystal & Dial

5 specs
Crystal
Mineral
Sapphire
Crystal Shape
Flat
Curved
AR Coating
Inner
Super-clear coating
Dial Color
Copper
Black
Lume
None
LumiBrite on hands and index(es)

Movement

3 specs
Caliber
Miyota 2035
5X83
Power Reserve
—
40h
Jewels
25
14

Pricing

1 specs
MSRP
—
$2,400
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