Side by side

Seiko Prospex SeavsYema Navygraf Marine Nationale Quartz

The numbers, the dial colors, the calibers — laid out so you can stop flipping between tabs.

Prospex Sea
SeikoProspex Sea
MSRP $595
Navygraf Marine Nationale Quartz
YemaNavygraf Marine Nationale Quartz
MSRP $499

At a glance

14 of 29 specs differ
Diameter
Prospex Sea41.7mm
Navygraf Marine Nationale Quartz39mm
Power Reserve
Prospex Sea41h
Navygraf Marine Nationale Quartz40h
Water Resistance
Prospex Sea200m
Navygraf Marine Nationale Quartz100m
MSRP
Prospex Sea$595
Navygraf Marine Nationale Quartz$499

Full specifications

Case

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

Crystal & Dial

3 specs
Crystal
Hardlex
Sapphire
Dial Color
Black
Standard
Lume
LumiBrite on hands, index(es) and bezel
None

Movement

4 specs
Caliber
4R35
Type
Automatic
Quartz
Power Reserve
41h
40h
Jewels
23
25

Pricing

1 specs
MSRP
$595
$499

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What people say

Owners + reviewers, side by side

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

Seiko Prospex Sea

Owners and reviewers widely praise the Seiko Prospex Sea for its excellent value, robust build, and superior lume, with many noting its comfortable wearability and faithful design recreations. Some owners report the watch can feel big, thick, and heavy on smaller wrists, while others find the sizing perfect. The bezel action is frequently highlighted as smooth and precise, often exceeding that of less expensive models. On balance, owners and reviewers rate the Seiko Prospex Sea highly for its impressive finishing and value proposition.

Yema Navygraf Marine Nationale Quartz

Owners praise the Yema Navygraf Marine Nationale Quartz for its well-made case, clean legible dial, and comfortable 39mm size, with one noting its thin profile for 300m water resistance. Accuracy figures vary, with one owner reporting +6 seconds per day and another seeing it keep within COSC time. Minor criticisms include a steel bracelet with a slight rattle and sharp edges, bent bracelet pins, and in one instance, crooked dial printing. On balance, owners find the Yema Navygraf Marine Nationale Quartz offers good value and wearability, with its French design and thinner case being key highlights.

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