Which is bigger, the Aera Instruments M-1 or the Marathon Steel Navigator SSNAV Auto?

The Marathon Steel Navigator SSNAV Auto wears larger at 41mm versus 39mm for the Aera Instruments M-1 — a 2mm difference across the dial.

Which has better water resistance, the Aera Instruments M-1 or the Marathon Steel Navigator SSNAV Auto?

The Marathon Steel Navigator SSNAV Auto is rated to 60m versus 30m for the Aera Instruments M-1.

What movement does the Aera Instruments M-1 run compared to the Marathon Steel Navigator SSNAV Auto?

Both watches run automatic movements — the Aera Instruments M-1 uses the Sellita SW216-1 and the Marathon Steel Navigator SSNAV Auto uses the Sellita SW200-1.

Side by side

Aera Instruments M-1vsMarathon Steel Navigator SSNAV Auto

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

Aera Instruments M-1

Marathon Steel Navigator SSNAV Auto

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

MSRP $1,300

At a glance

11 of 29 specs differ

Diameter

M-139mm

Steel Navigator SSNAV Auto41mm

Power Reserve

M-1—

Steel Navigator SSNAV Auto40h

Water Resistance

M-130m

Steel Navigator SSNAV Auto60m

MSRP

M-1—

Steel Navigator SSNAV Auto$1,300

Full specifications

Case

6 specs

Crystal & Dial

2 specs

Dial Color

Dune

Black

Lume

Super-LumiNova

None

Movement

2 specs

Caliber

Sellita SW216-1

Sellita SW200-1

Power Reserve

—

40h

Pricing

1 specs

MSRP

—

$1,300

Follow this matchup

Get a note when Aera Instruments M-1 vs Marathon Steel Navigator SSNAV Auto gets more votes, a community discussion, or a price drop. No account needed.

Keep exploring