Seiko HBC011J1vsYema Navygraf Pearl CMM.20
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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.
HBC011J1
Navygraf Pearl CMM.20
Diameter
40mm
39mm
Lug-to-Lug
46.4mm
46mm
lowest
Thickness
13mm
9.8mm
lowest
Water Resistance
300m
highest
100m
Power Reserve
72h
n/a
MSRP
$1,400
lowest
$1,862
Movement
Seiko 6R55
Yema CMM.20
Case
6 specsCrystal & Dial
2 specsMovement
2 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
Owners praise the Seiko HBC011J1's sensible proportions and the character of its green-and-gilt colorway, finding it feels "alive" and useful with its included silicone strap. Reviewers note the fan-selected turquoise dial and bezel with a wave pattern, blending vintage inspiration with modern features like an updated clasp. The Seiko 6R55 automatic movement is specified, offering a 72-hour power reserve and rated for +25/-15 seconds per day. Overall, owners and reviewers view the Seiko HBC011J1 positively, with its fan-selected design and engaging feel being key strengths.
The Yema Navygraf Pearl CMM.20 is praised for its elegant and slim case design, measuring between 9.5mm and 9.75mm thick, and its unique mother-of-pearl dial and bezel. The watch features functional dive watch elements like 200-meter water resistance and is powered by the in-house CMM.20 micro-rotor movement, which offers a 70-hour power reserve and is adjusted to -3/+7 seconds a day. Overall, reviewers highlight the Yema Navygraf Pearl CMM.20's sophisticated aesthetic and slim profile as its primary strengths.
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