Maen Skymaster 38 MkiiivsSeiko Prospex Speedtimer

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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.

Maen Skymaster 38 Mkiii at true scale

Skymaster 38 Mkiii

Seiko Prospex Speedtimer at true scale

Prospex Speedtimer

Diameter

38mm

39mm

Lug-to-Lug

n/a

45.5mm

Thickness

13.4mm

13.3mm

lowest

Water Resistance

100m

100m

MSRP

$1,679

$725

lowest

Movement

Sellita SW510

Seiko V192

Case

5 specs
Diameter
38mm
39mm
Thickness
13.4mm
13.3mm
Lug-to-Lug
n/a
45.5mm
Lug Width
n/a
20mm
Material
316L Stainless Steel
Stainless Steel

Crystal & Dial

5 specs
Crystal
Domed Sapphire
Sapphire
Crystal Shape
n/a
Curved
AR Coating
n/a
Anti-reflective coating on inner surface
Dial Color
M6.1.1
n/a
Lume
None
LumiBrite on hands and index(es)

Movement

2 specs
Caliber
Sellita SW510
Seiko V192
Type
Automatic
Quartz

Pricing

1 specs
MSRP
$1,679
$725
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Reviews

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

Maen Skymaster 38 Mkiii

The Maen Skymaster 38 MKIII is praised for its refined case, impressive fit and finish, and compact 38mm size, which is considered a positive for a modern mechanical chronograph. Reviewers highlight its clean dial, sharp legibility, and well-executed applied markers, with one noting a brown sunburst dial evoking vintage tropical effects. The winding action is described as sweet, and the watch is powered by a Sellita SW510Mb manual-wind movement. Accuracy figures vary, with one source reporting an average of +7 seconds per day and another stating a tolerance of +/-15 seconds per day, and both note a 63-hour power reserve. Overall, reviewers rate the Maen Skymaster 38 MKIII highly for its vintage-inspired design and premium feel at its price point.

From video reviewers

The 38mm case size is a key strength for the Maen Skymaster 38 MKIII. Reviewers noted the excellent quality-price ratio for a Swiss-made chronograph.

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.

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