Seiko Prospex SeavsYema 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 Prospex Sea at true scale

Prospex Sea

Yema Navygraf Marine Nationale CMM.10 at true scale

Navygraf Marine Nationale CMM.10

Diameter

41.7mm

39mm

Lug-to-Lug

49.5mm

46mm

lowest

Thickness

12.3mm

11mm

lowest

Water Resistance

200m

highest

100m

Power Reserve

41h

n/a

MSRP

$595

lowest

$1,614

Movement

Seiko 4R35

Yema CMM.10

Case

6 specs
Diameter
41.7mm
39mm
Thickness
12.3mm
11mm
Lug-to-Lug
49.5mm
46mm
Lug Width
20mm
19mm
Material
Stainless Steel
316L Stainless Steel
Water Resistance
200m
100m

Crystal & Dial

3 specs
Crystal
Hardlex
Domed Sapphire
Dial Color
n/a
Blue
Lume
LumiBrite on hands, index(es) and bezel
None

Movement

3 specs
Caliber
Seiko 4R35
Yema CMM.10
Power Reserve
41h
0h
Jewels
23
0

Pricing

1 specs
MSRP
$595
$1,614
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Reviews

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

Seiko Prospex Sea

Owners widely report the Seiko Prospex Sea is a well-built watch at a fair price, with some finding its 41.7mm case size perfect while others with smaller wrists consider it big, thick, and heavy. Reviewers consistently praise the excellent lume and robust design. One owner notes the bezel action is smoother and more precise than some other Seiko divers. Overall, owners and reviewers rate the Seiko Prospex Sea highly for its value and proven design.

Yema Navygraf Marine Nationale CMM.10

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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