Side by side

Seiko Prospex SeavsTudor Black Bay GMT S&G

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

Prospex Sea
SeikoProspex Sea
MSRP $1,100
Black Bay GMT S&G
TudorBlack Bay GMT S&G
MSRP $5,825

At a glance

20 of 29 specs differ
Diameter
Prospex Sea41.3mm
Black Bay GMT S&G41mm
Power Reserve
Prospex Sea72h
Black Bay GMT S&G70h
Water Resistance
Prospex Sea300m
Black Bay GMT S&G200m
MSRP
Prospex Sea$1,100
Black Bay GMT S&G$5,825

Full specifications

Case

8 specs
Category
Diver
GMT
Diameter
41.3mm
41mm
Thickness
12.5mm
14.6mm
Lug-to-Lug
48.2mm
46mm
Lug Width
20mm
22mm
Finish
Brushed and polished
Polished + Satin
Water Resistance
300m
200m
Caseback
Solid
Engraved

Crystal & Dial

4 specs
Crystal Shape
Flat
AR Coating
Anti-reflective coating on inner surface
Indices
Applied
Lume
LumiBrite on hands, index(es) and bezel
None

Movement

7 specs
Caliber
6R55
MT5652
Beat Rate
28,800 vph
0 vph
Power Reserve
72h
70h
Jewels
24
0
Hacking
Yes
No
Hand-winding
Yes
No
Complications
None
GMT

Pricing

1 specs
MSRP
$1,100
$5,825

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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.

Tudor Black Bay GMT S&G

Owners widely praise the Tudor Black Bay GMT S&G for its muted gold tone and cohesive design, with reviewers noting its value proposition around $5,000-$5,300, powered by an in-house GMT movement. Some owners find the 41mm case and weight make it feel large on the wrist, while reviewers are split on wearability and the execution of the "Root Beer" aesthetic. Concerns are raised about the aluminum bezel insert and initial wear on the gold plating at its price point, though some see the gold-capped bracelet and crown as understandable compromises. Overall, owners and reviewers rate the Tudor Black Bay GMT S&G highly for its unique aesthetic and strong value, with the cohesive design and GMT functionality being key draws.

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