Which is bigger, the Marathon Steel Navigator SSNAV Auto or the Tornek-Rayville TR-660 Sapphire Non-date?

The Marathon Steel Navigator SSNAV Auto wears larger at 41mm versus 40mm for the Tornek-Rayville TR-660 Sapphire Non-date — a 1mm difference across the dial.

Which has better water resistance, the Marathon Steel Navigator SSNAV Auto or the Tornek-Rayville TR-660 Sapphire Non-date?

The Tornek-Rayville TR-660 Sapphire Non-date is rated to 200m versus 60m for the Marathon Steel Navigator SSNAV Auto.

Which has a longer power reserve, the Marathon Steel Navigator SSNAV Auto or the Tornek-Rayville TR-660 Sapphire Non-date?

The Tornek-Rayville TR-660 Sapphire Non-date carries a 50-hour power reserve against 40 hours on the Marathon Steel Navigator SSNAV Auto.

What movement does the Marathon Steel Navigator SSNAV Auto run compared to the Tornek-Rayville TR-660 Sapphire Non-date?

Both watches run automatic movements — the Marathon Steel Navigator SSNAV Auto uses the Sellita SW200-1 and the Tornek-Rayville TR-660 Sapphire Non-date uses the TMI NH38.

Side by side

Marathon Steel Navigator SSNAV AutovsTornek-Rayville TR-660 Sapphire Non-date

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

Marathon Steel Navigator SSNAV Auto

41mm-steel-navigator-automatic-ssnav-auto-on-ballistic-nylon

MSRP $1,300

Tornek-Rayville TR-660 Sapphire Non-date

tr-660-w-sapphire-inlay-1201-non-date-3167895

At a glance

11 of 29 specs differ

Diameter

Steel Navigator SSNAV Auto41mm

TR-660 Sapphire Non-date40mm

Power Reserve

Steel Navigator SSNAV Auto40h

TR-660 Sapphire Non-date50h

Water Resistance

Steel Navigator SSNAV Auto60m

TR-660 Sapphire Non-date200m

MSRP

Steel Navigator SSNAV Auto$1,300

TR-660 Sapphire Non-date—

Full specifications

Case

6 specs

Crystal & Dial

2 specs

AR Coating

Inner

Yes

Lume

None

Superluminova

Movement

2 specs

Caliber

Sellita SW200-1

TMI NH38

Power Reserve

40h

50h

Pricing

1 specs

MSRP

$1,300

—

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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.

Marathon Steel Navigator SSNAV Auto

The Marathon Steel Navigator SSNAV Auto is praised for its high-accuracy quartz movement, with owners noting its comfort and reliable performance. Reviewers highlight its functional tool-watch appeal, featuring a sandblasted steel case, tritium tubes for constant low-light visibility, and 100-meter water resistance. One owner finds the 41mm case runs a bit small. The Marathon Steel Navigator SSNAV Auto utilizes an ETA F06.412 quartz movement with a claimed accuracy of +/- 10 seconds per year and includes a GMT bidirectional bezel. Overall, owners and reviewers rate the Marathon Steel Navigator SSNAV Auto highly for its comfortable wear and dependable, high-accuracy quartz movement.

A Blog to Watch·2

WatchUSeek·2

Tornek-Rayville TR-660 Sapphire Non-date

Owners widely praise the Tornek-Rayville TR-660 for its quality, good timekeeping, and suitability as a military diver reissue. The 40mm bead-blasted 316L stainless steel case, sapphire bezel inlay, and Arclite Super LumiNova are noted features, powered by a Japanese TMI NH38 automatic movement and water-resistant to 20 ATMs. Some owners suggest alternatives due to availability issues with the small-batch releases. Overall, owners rate the Tornek-Rayville TR-660 highly for its faithful reissue design and quality build at its price point.

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