Which is bigger, the Marathon Steel Navigator SSNAV-D Auto or the Redux Zero-Hour?

The Marathon Steel Navigator SSNAV-D Auto wears larger at 41mm versus 39mm for the Redux Zero-Hour — a 2mm difference across the dial.

Which has better water resistance, the Marathon Steel Navigator SSNAV-D Auto or the Redux Zero-Hour?

The Redux Zero-Hour 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 Redux Zero-Hour?

The Redux Zero-Hour carries a 41-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 Redux Zero-Hour?

Both watches run automatic movements — the Marathon Steel Navigator SSNAV-D Auto uses the Sellita SW220-1 and the Redux Zero-Hour uses the Seiko NH35.

Side by side

Marathon Steel Navigator SSNAV-D AutovsRedux Zero-Hour

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

Redux Zero-Hour

the-courg-watch-zero-hour-39mm

At a glance

9 of 29 specs differ

Diameter

Steel Navigator SSNAV-D Auto41mm

Zero-Hour39mm

Power Reserve

Steel Navigator SSNAV-D Auto40h

Zero-Hour41h

Water Resistance

Steel Navigator SSNAV-D Auto60m

Zero-Hour200m

MSRP

Steel Navigator SSNAV-D Auto$1,400

Zero-Hour—

Full specifications

Case

6 specs

Movement

2 specs

Caliber

Sellita SW220-1

Seiko NH35

Power Reserve

40h

41h

Pricing

1 specs

MSRP

$1,400

—

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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-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

Redux Zero-Hour

Owners widely praise the Redux Courg Type 39MM for its robust, no-nonsense design and good overall quality, with a reliable Seiko NH53A movement keeping time well. The titanium case and crystal have shown scratch resistance, and the bezel action is described as tight by some. Reviewers note the proprietary RDXB1 or blue lume glows brilliantly, though briefly. Some owners flag the crown stem as flimsy and the unidirectional bezel as having some play. Overall, owners rate the Redux Courg Type 39MM highly for its functional tool-watch design and durable titanium construction.

Reddit·2

WatchUSeek

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