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

The Marathon Steel Navigator SSNAV-D 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-D 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-D Auto.

Which has a longer power reserve, the Marathon Steel Navigator SSNAV-D 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-D Auto.

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

Both watches run automatic movements — the Marathon Steel Navigator SSNAV-D Auto uses the Sellita SW220-1 and the Tornek-Rayville TR-660 Sapphire Non-date uses the TMI NH38.

Side by side

Marathon Steel Navigator SSNAV-D 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-D Auto

41mm-steel-navigator-automatic-w-date-ssnav-d-on-ballistic-nylon

MSRP $1,400

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-D Auto41mm

TR-660 Sapphire Non-date40mm

Power Reserve

Steel Navigator SSNAV-D Auto40h

TR-660 Sapphire Non-date50h

Water Resistance

Steel Navigator SSNAV-D Auto60m

TR-660 Sapphire Non-date200m

MSRP

Steel Navigator SSNAV-D Auto$1,400

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 SW220-1

TMI NH38

Power Reserve

40h

50h

Pricing

1 specs

MSRP

$1,400

—

Follow this matchup

Get a note when Marathon Steel Navigator SSNAV-D Auto vs Tornek-Rayville TR-660 Sapphire Non-date gets more votes, a community discussion, or a price drop. No account needed.

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-D Auto

The Marathon Steel Navigator SSNAV-D Auto is praised for its durable construction, featuring a sandblasted steel case with improved lugs, a bi-directional bezel with excellent action, and 100m water resistance. Owners appreciate the constant visibility provided by self-illuminating tritium gas tubes and the precision of its ETA F06.412 quartz movement, which offers accuracy to about 10 seconds per year. The watch includes a GMT bezel for dual timekeeping and a synthetic sapphire crystal. Overall, owners and reviewers rate the Marathon Steel Navigator SSNAV-D Auto highly for its robust tool-watch design and reliable tritium illumination.

A Blog to Watch·2

WatchUSeek

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.

WatchUSeek·3

Keep exploring