Selten M1 MoonphasevsSeiko Prospex Land Mechanical
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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.

M1 Moonphase

Prospex Land Mechanical
Diameter
39mm
39.5mm
Lug-to-Lug
45.5mm
lowest
46.4mm
Thickness
11.4mm
lowest
12.7mm
Water Resistance
50m
200m
highest
Power Reserve
n/a
72h
MSRP
n/a
$995
Movement
Miyota 9015
Seiko 6R55
Case
4 specsCrystal & Dial
3 specsMovement
3 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners praise the Selten M1 Moonphase for its attractive aventurine dial, excellent finishing relative to its price point, and comfortable 39mm case size, noting a custom rotor on the Miyota 9015 movement. One commenter found the date window to look cheap. Overall, owners appreciate the Selten M1 Moonphase for its striking dial and value proposition.
The guilloché dial—detailed and color-shifting across angles—commands attention and justifies extended wear. The bracelet rattles noticeably and the lugs feel sharp against skin.
Owners widely praise the Seiko Prospex Land Mechanical for its unique style, dial texture, and color, with many finding its 39.5mm case size appealing and suitable for daily wear. Some owners, however, report the watch feels big, thick, and heavy, potentially uncomfortable for smaller wrists, and a few consider its price high for the features offered. One owner noted its accuracy and durability during water submersion, while another specifically praised its useful day-date complication. Overall, owners rate the Seiko Prospex Land Mechanical highly for its aesthetic appeal and versatile design, with the case dimensions and unique style being the primary drivers of satisfaction.
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