Seiko Prospex SpeedtimervsUndone Sport Speedy

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Seiko Prospex Speedtimer

MSRP $725

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Buy from Seiko Used on eBay

Undone Sport Speedy

MSRP $285

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Buy from Undone Used on eBay

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Measurements

Catalog photos are all shot at the same flattering size. These aren't: every case below shares one millimeter scale.

Prospex Speedtimer

Sport Speedy

Diameter

Across the case, crown excluded.

39mm

40mm

Lug-to-Lug

The number that decides fit.

45.5mm

n/a

Thickness

How it sits under a cuff.

13.3mm

n/a

Water Resistance

Rated in meters.

100m

highest

30m

MSRP

Sticker price, new.

$725

$285

lowest

Movement

What drives the hands.

Seiko V192

Seiko VK64

Spec

Prospex Speedtimer

Sport Speedy

Case

5 specs

Diameter

39mm

40mm

Thickness

13.3mm

n/a

Lug-to-Lug

45.5mm

n/a

Lug Width

20mm

n/a

Water Resistance

100m

30m

Crystal & Dial

5 specs

Crystal

Sapphire

n/a

Crystal Shape

Curved

n/a

AR Coating

Anti-reflective coating on inner surface

n/a

Dial Color

n/a

Lume

LumiBrite on hands and index(es)

None

Movement

3 specs

Caliber

Seiko V192

Seiko VK64

Type

Quartz

Meca-Quartz

Power Reserve

n/a

Pricing

1 specs

MSRP

$725

$285

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Reviews

Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.

Seiko Prospex Speedtimer

Owners widely praise the Seiko Prospex SPEEDTIMER for its vintage-inspired design and versatility as an everyday watch. Some owners find the 39mm case size comfortable and well-suited for active use. Reviewers note the solar-powered V192 movement offers a six-month power reserve. Criticisms include the watch's thickness, which some find to be between 13-15mm, and the 24-hour subdial. The price point is a recurring point of contention, with some owners questioning the value for a solar quartz chronograph. On balance, owners and reviewers find the Seiko Prospex SPEEDTIMER a capable and attractive watch, with its design being the most frequently cited positive attribute.

From video reviewers

The Seiko Prospex SPEEDTIMER's solar movement provides reliable power without battery replacements and accurate timekeeping, with a claimed accuracy of ±15 seconds per month. A notable trade-off is the watch's slightly thicker profile and somewhat lacking lume brightness. Reviewers disagree on whether the bezel action is smooth and clicky, with one reviewer praising it and the other not mentioning it.

Owners praise the Undone Sport Speedy's vintage chronograph aesthetic and the accuracy of its meca-quartz movement. Reviewers highlight the extensive customization options and value at $315. One owner finds the leather strap stiff and the display case back on a quartz watch unnecessary. Another reviewer notes the meca-quartz VK64 movement's pusher feel and hand reset are mechanical-like, though the movement itself is undecorated. On balance, owners and reviewers rate the Undone Sport Speedy highly for its vintage styling and customization potential at its price point.

Fratello·3