Seiko Prospex SpeedtimervsSternglas Tachymeter

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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.

Seiko Prospex Speedtimer at true scale

Prospex Speedtimer

Sternglas Tachymeter at true scale

Tachymeter

Diameter

39mm

42mm

Lug-to-Lug

45.5mm

lowest

50mm

Thickness

13.3mm

10mm

lowest

Water Resistance

100m

highest

50m

MSRP

$725

$312

lowest

Movement

Seiko V192

Miyota OS20

Case

4 specs
Diameter
39mm
42mm
Thickness
13.3mm
10mm
Lug-to-Lug
45.5mm
50mm
Water Resistance
100m
50m

Crystal & Dial

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

Movement

3 specs
Caliber
Seiko V192
Miyota OS20
Power Reserve
0h
n/a
Jewels
0
n/a

Pricing

1 specs
MSRP
$725
$312
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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.

Sternglas Tachymeter

The Sternglas Tachymeter is praised for its sporty chronograph design and wrist presence, offering character without being an overt tool watch. Reviewers note an upscale design with a colored aluminum bezel insert and more colorful dial options compared to its predecessor. The watch is considered good value for its design, functionality, and small-brand cachet, with a charming youthfulness in its colorful dial options. One reviewer points out that the "orange" on one model appears yellow and suggests a tachymeter scale extending to 200 would be more useful than the current 500. Overall, owners and reviewers rate the Sternglas Tachymeter highly for its competitive price and appealing, youthful design.

From video reviewers

The value at the moderate price point is a strength. The use of a meca-quartz movement is a weakness. Reviewers disagree on whether the meca-quartz movement is a drawback.