Which is cheaper, the Marathon Steel Navigator SSNAV Auto or the Grand Seiko STGK003?

At MSRP the Marathon Steel Navigator SSNAV Auto is the cheaper of the two at $1,300, against $31,200 for the Grand Seiko STGK003 — a $29,900 gap before any retailer discounting.

Which is bigger, the Marathon Steel Navigator SSNAV Auto or the Grand Seiko STGK003?

The Marathon Steel Navigator SSNAV Auto wears larger at 41mm versus 28.7mm for the Grand Seiko STGK003 — a 12.3mm difference across the dial.

Which has better water resistance, the Marathon Steel Navigator SSNAV Auto or the Grand Seiko STGK003?

The Grand Seiko STGK003 is rated to 100m versus 60m for the Marathon Steel Navigator SSNAV Auto.

Which has a longer power reserve, the Marathon Steel Navigator SSNAV Auto or the Grand Seiko STGK003?

The Grand Seiko STGK003 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 Grand Seiko STGK003?

Both watches run automatic movements — the Marathon Steel Navigator SSNAV Auto uses the Sellita SW200-1 and the Grand Seiko STGK003 uses the 9S27.

Side by side

Marathon Steel Navigator SSNAV AutovsGrand Seiko STGK003

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

Grand Seiko STGK003

stgk003j

MSRP $31,200

At a glance

11 of 29 specs differ

Diameter

Steel Navigator SSNAV Auto41mm

STGK00328.7mm

Power Reserve

Steel Navigator SSNAV Auto40h

STGK00350h

Water Resistance

Steel Navigator SSNAV Auto60m

STGK003100m

MSRP

Steel Navigator SSNAV Auto$1,300

STGK003$31,200

Full specifications

Case

7 specs

Crystal & Dial

1 specs

AR Coating

Inner

Yes

Movement

2 specs

Caliber

Sellita SW200-1

9S27

Power Reserve

40h

50h

Pricing

1 specs

MSRP

$1,300

$31,200

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