Which is cheaper, the Marathon Steel Navigator SSNAV Auto or the Grand Seiko STGF387?

At MSRP the Marathon Steel Navigator SSNAV Auto is the cheaper of the two at $1,300, against $4,200 for the Grand Seiko STGF387 — a $2,900 gap before any retailer discounting.

Which is bigger, the Marathon Steel Navigator SSNAV Auto or the Grand Seiko STGF387?

The Marathon Steel Navigator SSNAV Auto wears larger at 41mm versus 26mm for the Grand Seiko STGF387 — a 15mm difference across the dial.

Which has better water resistance, the Marathon Steel Navigator SSNAV Auto or the Grand Seiko STGF387?

The Grand Seiko STGF387 is rated to 100m versus 60m for the Marathon Steel Navigator SSNAV Auto.

What movement does the Marathon Steel Navigator SSNAV Auto run compared to the Grand Seiko STGF387?

The Marathon Steel Navigator SSNAV Auto runs a automatic caliber (Sellita SW200-1), while the Grand Seiko STGF387 runs a quartz (4J51).

Side by side

Marathon Steel Navigator SSNAV AutovsGrand Seiko STGF387

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 STGF387

stgf387g

MSRP $4,200

At a glance

11 of 29 specs differ

Diameter

Steel Navigator SSNAV Auto41mm

STGF38726mm

Power Reserve

Steel Navigator SSNAV Auto40h

STGF38740h

Water Resistance

Steel Navigator SSNAV Auto60m

STGF387100m

MSRP

Steel Navigator SSNAV Auto$1,300

STGF387$4,200

Full specifications

Case

7 specs

Crystal & Dial

1 specs

AR Coating

Inner

Yes

Movement

2 specs

Caliber

Sellita SW200-1

4J51

Type

Automatic

Quartz

Pricing

1 specs

MSRP

$1,300

$4,200

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