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

Seiko Prospex Sea models are widely praised for their excellent build quality, value for money, and comfortable wearability, with many appreciating the vintage-inspired designs and robust construction. Owners note the silicone straps are surprisingly comfortable and well-finished, and the Lumibrite lume is excellent. However, some find the 44.3mm size and thickness too large for smaller wrists, though others report the sizing as perfect. The 6R15 movement in some variants offers accuracy around +4 seconds per day with a 50-hour power reserve, while newer movements offer more. Some models are criticized for a bracelet width not matching the case size or a rudimentary clasp for their price point. Overall, owners and reviewers rate the Seiko Prospex Sea highly for its impressive case work and finishing at its price point.

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 Sea41.3mm
Shellback40mm
Power Reserve
Prospex Sea72h
Shellback
Water Resistance
Prospex Sea300m
Shellback200m
MSRP
Prospex Sea$1,100
Shellback$840

Full specifications

Case

5 specs
Category
Diver
Diameter
41.3mm
40mm
Thickness
12.5mm
11.9mm
Lug-to-Lug
48.2mm
47mm
Water Resistance
300m
200m

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 6R55
Sellita SW200-1
Power Reserve
72h
Jewels
24
0

Pricing

1 specs
MSRP
$1,100
$840
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