Side by side

Seiko AstronvsTornek-Rayville Blakjak 12-hr GMT

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

Astron
SeikoAstron
MSRP $2,500
Blakjak 12-hr GMT
Tornek-RayvilleBlakjak 12-hr GMT
MSRP $895

At a glance

14 of 29 specs differ
Diameter
Astron42mm
Blakjak 12-hr GMT42.5mm
Power Reserve
Astron40h
Blakjak 12-hr GMT42h
Water Resistance
Astron100m
Blakjak 12-hr GMT200m
MSRP
Astron$2,500
Blakjak 12-hr GMT$895

Full specifications

Case

7 specs
Category
GMT
Diver
Diameter
42mm
42.5mm
Thickness
12.4mm
13.2mm
Lug-to-Lug
49.5mm
49mm
Lug Width
14mm
22mm
Material
Titanium
Stainless Steel
Water Resistance
100m
200m

Crystal & Dial

2 specs
AR Coating
Super-clear coating
Yes
Lume
LumiBrite on hands and index(es)
Superluminova

Movement

4 specs
Caliber
5X83
SII NH36
Type
Quartz
Automatic
Power Reserve
40h
42h
Jewels
14
25

Pricing

1 specs
MSRP
$2,500
$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 Astron

Owners widely praise the Seiko Astron for its spectacular technology, solar-powered quartz movement, and GPS time synchronization, making it a convenient grab-and-go option. The watch is frequently noted for its comfortable and lightweight titanium build, with some models featuring well-finished cases and robust ceramic bezels. Reviewers and owners alike highlight the dial's dynamic and shiny appearance, with textured hour markers and high-contrast edges. Accuracy is generally considered good, with figures ranging from +/- 15 seconds per month to within 1/2 second per day, easily corrected by GPS signal. However, some owners note that DST requires manual adjustment and that automatic time syncing depends on proximity to radio wave towers. The price point is a concern for some, who feel it competes with luxury watches without the same aesthetic appeal. One owner pointed out minimal lume and a slight misalignment of the minute hand on their model.

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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