Seiko Seiko 5 Sports SKX seriesvsYema Navygraf Marine Nationale CMM.10
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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 5 Sports SKX series

Navygraf Marine Nationale CMM.10
Diameter
38mm
39mm
Lug-to-Lug
44.2mm
lowest
46mm
Thickness
12.1mm
11mm
lowest
Water Resistance
100m
100m
Power Reserve
41h
n/a
MSRP
$350
lowest
$1,614
Movement
Seiko 4R36
Yema CMM.10
Case
5 specsCrystal & Dial
3 specsMovement
3 specsPricing
1 specsReviews
Synthesized for each watch independently from owner discussions, enthusiast forums, written reviews, and video reviewers.
The Seiko 5 Sports SKX series is widely praised as an excellent value gateway watch, with owners and reviewers highlighting its solid build and powerful lume. The 22mm bracelet is noted for its comfort, and the watch offers numerous style options. Some owners find the original SKX models heavy and bulky, while others appreciate their ruggedness and iconic dive watch design. The Seiko 5 Sports SKX series offers an upgraded movement with hacking and hand-winding, and standard spring bars for easier strap changes. However, it lacks the screw-down crown and ISO certification of the original SKX, leading some to consider it less of a tool watch. On balance, owners and reviewers rate the Seiko 5 Sports SKX series highly for its value and modern features, despite some preferring the tool watch capabilities of its predecessor.
The Yema Navygraf Marine Nationale CMM.10 is lauded for its vibrant blue dial and bezel, a clean and legible display, and its in-house CMM.10 automatic movement. Reviewers highlight the 70-hour power reserve and a price point under $2,000 as significant strengths. However, the steel bracelet's clasp is consistently noted as rattly and difficult to open, with one review describing it as feeling slightly cheap. The watch features a 39mm case with a blue sapphire bezel insert and a matte navy dial. Overall, reviewers praise the Yema Navygraf Marine Nationale CMM.10 for its attractive design and strong value proposition, despite minor criticisms of the bracelet clasp.
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