Side by side

Seiko Prospex SeavsTuseno Shellback

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

Some links are affiliate links — lug2lug may earn a commission at no extra cost to you. Disclosures

Some links are affiliate links — lug2lug may earn a commission at no extra cost to you. Disclosures

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.

Tuseno Shellback

The build quality is cited as a significant strength. Availability is a weakness, with stock running low.

At a glance

11 of 29 specs differ
Diameter
Prospex Sea41.7mm
Shellback40mm
Power Reserve
Prospex Sea41h
Shellback
Water Resistance
Prospex Sea200m
Shellback200m
MSRP
Prospex Sea$595
Shellback$840

Full specifications

Case

4 specs
Category
Diver
Diameter
41.7mm
40mm
Thickness
12.3mm
11.9mm
Lug-to-Lug
49.5mm
47mm

Crystal & Dial

3 specs
Crystal
Hardlex
Sapphire
Dial Color
Yellow
Lume
LumiBrite on hands, index(es) and bezel
Super-LumiNova

Movement

3 specs
Caliber
Seiko 4R35
Sellita SW200-1
Power Reserve
41h
Jewels
23
0

Pricing

1 specs
MSRP
$595
$840
Keep exploring

More watches worth a look

Matched to the watches above on size, movement, style and price — microbrands first. Open any one to dig in.

Follow this matchup

Get a note when Seiko Prospex Sea vs Tuseno Shellback gets more votes, a community discussion, or a price drop. No account needed.

Adjacent matchups

People also compared

Comparisons nearby in the catalog — alternatives to the watches above paired against the matchup.