Side by side

Seiko Prospex SeavsTuseno Shellback

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.

Seiko Prospex Sea

The Seiko Prospex Sea is widely praised for its excellent value, solid build quality, and comfortable wearability, with many models featuring impressive lume and attractive dials. Owners and reviewers highlight the modern upgrades on classic designs, such as drilled lugs and reliable movements with hacking and hand-winding capabilities. Some models are noted for their refined case finishing and scratch resistance. Accuracy figures vary, with one owner reporting approximately 4 seconds fast per day, while others find the movements offer good performance for the price. Concerns raised by owners and reviewers include clasps that can feel generic or cheap, and lug widths that some find disproportionate to the case size on certain models. The thickness and weight of some Prospex Sea watches are also noted as substantial. The GMT function on specific models is considered secondary and difficult to read for true travel purposes.

Tuseno Shellback

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

At a glance

12 of 29 specs differ
Diameter
Prospex Sea43.8mm
Shellback40mm
Power Reserve
Prospex Sea41h
Shellback
Water Resistance
Prospex Sea200m
Shellback200m
MSRP
Prospex Sea$625
Shellback$840

Full specifications

Case

5 specs
Category
Diver
Diameter
43.8mm
40mm
Thickness
12.8mm
11.9mm
Lug-to-Lug
48.7mm
47mm
Lug Width
22mm
20mm

Crystal & Dial

3 specs
AR Coating
Anti-reflective coating on inner surface
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
$625
$840
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