Side by side

Seiko Prospex SPEEDTIMERvsUndone Tachikoma

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

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Prospex SPEEDTIMER
SeikoProspex SPEEDTIMER
MSRP $750
See the full Prospex SPEEDTIMER
Tachikoma
UndoneTachikoma
MSRP $320
See the full Tachikoma
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At a glance

11 of 29 specs differ
Diameter
Prospex SPEEDTIMER41.4mm
Tachikoma41.8mm
Power Reserve
Prospex SPEEDTIMER—
Tachikoma—
Water Resistance
Prospex SPEEDTIMER100m
Tachikoma100m
MSRP
Prospex SPEEDTIMER$750
Tachikoma$320

Full specifications

Case

5 specs
Category
Chronograph
—
Diameter
41.4mm
41.8mm
Thickness
13mm
12.7mm
Lug-to-Lug
45.9mm
0mm
Lug Width
21mm
0mm

Crystal & Dial

4 specs
Crystal Shape
Curved
—
AR Coating
Anti-reflective coating on inner surface
—
Dial Color
—
—
Lume
LumiBrite on hands and index(es)
None

Movement

1 specs
Caliber
Seiko V192
Seiko VK63

Pricing

1 specs
MSRP
$750
$320
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