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Serket Watch Co Reef MarianavsSeiko Prospex Sea

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

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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.

Serket Watch Co Reef Mariana

Owners widely praise the Serket Watch Co Reef Mariana for its significant value, citing the sapphire crystal, ceramic bezel, and NH35 automatic movement at its price point. Some owners note the bezel turns too easily and suggest the lume could be improved. On balance, owners rate the Serket Watch Co Reef Mariana highly for its bold aesthetic and strong feature set at the price.

Seiko Prospex Sea

Owners widely praise the Seiko Prospex Sea for its excellent value, robust build, and superb lume, with many appreciating its comfortable wearability due to its case shape and lug-to-lug distance. Reviewers consistently highlight its impressive finishing and classic dive watch design, often noting the bright LumiBrite lume. Some owners find the watch to be large, thick, and heavy, while others consider it the perfect size, indicating a split opinion on wearability for smaller wrists. The power reserve from some movements is noted as less than newer variants, and the clasp quality receives mixed feedback. Overall, owners and reviewers rate the Seiko Prospex Sea highly for its exceptional finishing and value proposition in the dive watch market.

At a glance

12 of 29 specs differ
Diameter
Reef Mariana40mm
Prospex Sea34mm
Power Reserve
Reef Mariana
Prospex Sea
Water Resistance
Reef Mariana200m
Prospex Sea200m
MSRP
Reef Mariana$449
Prospex Sea$795

Full specifications

Case

5 specs
Category
Diver
Diameter
40mm
34mm
Thickness
13.2mm
8.7mm
Lug-to-Lug
47.5mm
40.8mm
Lug Width
20mm
16mm

Crystal & Dial

3 specs
AR Coating
Anti-reflective coating on inner surface
Dial Color
Orange
Lume
BGW9
LumiBrite on hands and index(es)

Movement

3 specs
Caliber
Seiko NH35
Seiko 6N01
Type
Automatic
Quartz
Power Reserve
0h

Pricing

1 specs
MSRP
$449
$795
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