Which is cheaper, the Marathon Steel Navigator SSNAV-D Auto or the Grand Seiko SBGW306?

At MSRP the Marathon Steel Navigator SSNAV-D Auto is the cheaper of the two at $1,400, against $17,900 for the Grand Seiko SBGW306 — a $16,500 gap before any retailer discounting.

Which is bigger, the Marathon Steel Navigator SSNAV-D Auto or the Grand Seiko SBGW306?

The Marathon Steel Navigator SSNAV-D Auto wears larger at 41mm versus 36.5mm for the Grand Seiko SBGW306 — a 4.5mm difference across the dial.

Which has better water resistance, the Marathon Steel Navigator SSNAV-D Auto or the Grand Seiko SBGW306?

The Grand Seiko SBGW306 is rated to 100m 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 Grand Seiko SBGW306?

The Grand Seiko SBGW306 carries a 72-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 Grand Seiko SBGW306?

The Marathon Steel Navigator SSNAV-D Auto runs a automatic caliber (Sellita SW220-1), while the Grand Seiko SBGW306 runs a manual (9S64).

Side by side

Marathon Steel Navigator SSNAV-D AutovsGrand Seiko SBGW306

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

Grand Seiko SBGW306

sbgw306j

MSRP $17,900

At a glance

12 of 29 specs differ

Diameter

Steel Navigator SSNAV-D Auto41mm

SBGW30636.5mm

Power Reserve

Steel Navigator SSNAV-D Auto40h

SBGW30672h

Water Resistance

Steel Navigator SSNAV-D Auto60m

SBGW306100m

MSRP

Steel Navigator SSNAV-D Auto$1,400

SBGW306$17,900

Full specifications

Case

7 specs

Crystal & Dial

1 specs

AR Coating

Inner

Yes

Movement

3 specs

Caliber

Sellita SW220-1

9S64

Type

Automatic

Manual

Power Reserve

40h

72h

Pricing

1 specs

MSRP

$1,400

$17,900

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