Side by side

Seiko Prospex SeavsTornek-Rayville Blakjak 12-hr GMT

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

Prospex Sea
SeikoProspex Sea
MSRP $595
Blakjak 12-hr GMT
Tornek-RayvilleBlakjak 12-hr GMT
MSRP $895

At a glance

11 of 29 specs differ
Diameter
Prospex Sea41.7mm
Blakjak 12-hr GMT42.5mm
Power Reserve
Prospex Sea41h
Blakjak 12-hr GMT42h
Water Resistance
Prospex Sea200m
Blakjak 12-hr GMT200m
MSRP
Prospex Sea$595
Blakjak 12-hr GMT$895

Full specifications

Case

4 specs
Diameter
41.7mm
42.5mm
Thickness
12.3mm
13.2mm
Lug-to-Lug
49.5mm
49mm
Lug Width
20mm
22mm

Crystal & Dial

3 specs
Crystal
Hardlex
Sapphire
AR Coating
Inner
Yes
Lume
LumiBrite on hands, index(es) and bezel
Superluminova

Movement

3 specs
Caliber
4R35
SII NH36
Power Reserve
41h
42h
Jewels
23
25

Pricing

1 specs
MSRP
$595
$895

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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

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.

Tornek-Rayville Blakjak 12-hr GMT

The Tornek-Rayville Blakjak 12-hr GMT is a 42.5mm stainless steel watch featuring a DLC-coated bezel, sapphire crystal, and a matte black dial with 12- and 24-hour scales. It is powered by a Seiko SII NH36 automatic movement, offering a 41-hour power reserve, and boasts 200 meters of water resistance. The dial includes a day/date complication and Super-LumiNova BGW9 lume. Overall, owners and reviewers highlight its robust build and functional military-inspired design as key strengths.

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