Which is cheaper, the Grand Seiko SBGK006 or the Yema Navygraf Marine Nationale Quartz?

At MSRP the Yema Navygraf Marine Nationale Quartz is the cheaper of the two at $499, against $22,200 for the Grand Seiko SBGK006 — a $21,701 gap before any retailer discounting.

Which has better water resistance, the Grand Seiko SBGK006 or the Yema Navygraf Marine Nationale Quartz?

The Yema Navygraf Marine Nationale Quartz is rated to 100m versus 30m for the Grand Seiko SBGK006.

Which has a longer power reserve, the Grand Seiko SBGK006 or the Yema Navygraf Marine Nationale Quartz?

The Grand Seiko SBGK006 carries a 72-hour power reserve against 40 hours on the Yema Navygraf Marine Nationale Quartz.

What movement does the Grand Seiko SBGK006 run compared to the Yema Navygraf Marine Nationale Quartz?

The Grand Seiko SBGK006 runs a manual caliber (9S63), while the Yema Navygraf Marine Nationale Quartz runs a quartz.

Side by side

Grand Seiko SBGK006vsYema Navygraf Marine Nationale Quartz

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

Grand Seiko SBGK006

sbgk006j

MSRP $22,200

Yema Navygraf Marine Nationale Quartz

yema-navygraf-marine-nationale-quartz-ymhfmn39

MSRP $499

At a glance

11 of 29 specs differ

Diameter

SBGK00639mm

Navygraf Marine Nationale Quartz39mm

Power Reserve

SBGK00672h

Navygraf Marine Nationale Quartz40h

Water Resistance

SBGK00630m

Navygraf Marine Nationale Quartz100m

MSRP

SBGK006$22,200

Navygraf Marine Nationale Quartz$499

Full specifications

Case

5 specs

Crystal & Dial

2 specs

AR Coating

Yes

Inner

Dial Color

Black

Standard

Movement

3 specs

Caliber

9S63

—

Type

Manual

Quartz

Power Reserve

72h

40h

Pricing

1 specs

MSRP

$22,200

$499

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