Side by side

A-13A A-13AvsSeiko Prospex SPEEDTIMER Mechanical Chronograph

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

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A-13A
A-13AA-13A
Prospex SPEEDTIMER Mechanical Chronograph
SeikoProspex SPEEDTIMER Mechanical Chronograph
MSRP $2,500
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Buy used on eBay ↗
Buy from Seiko ↗
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At a glance

12 of 29 specs differ
Diameter
A-13A42mm
Prospex SPEEDTIMER Mechanical Chronograph42mm
Power Reserve
A-13A—
Prospex SPEEDTIMER Mechanical Chronograph45h
Water Resistance
A-13A100m
Prospex SPEEDTIMER Mechanical Chronograph100m
MSRP
A-13A—
Prospex SPEEDTIMER Mechanical Chronograph$2,500

Full specifications

Case

3 specs
Category
—
Chronograph
Thickness
13.4mm
14.6mm
Lug-to-Lug
50.8mm
49.5mm

Crystal & Dial

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

Movement

4 specs
Caliber
ETA 251.264
8R48
Type
Quartz
Automatic
Power Reserve
—
45h
Jewels
25
34

Pricing

1 specs
MSRP
—
$2,500
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