Which is cheaper, the Grand Seiko SBGW306 or the Yema Navygraf Marine Nationale Quartz?

At MSRP the Yema Navygraf Marine Nationale Quartz is the cheaper of the two at $499, against $17,900 for the Grand Seiko SBGW306 — a $17,401 gap before any retailer discounting.

Which is bigger, the Grand Seiko SBGW306 or the Yema Navygraf Marine Nationale Quartz?

The Yema Navygraf Marine Nationale Quartz wears larger at 39mm versus 36.5mm for the Grand Seiko SBGW306 — a 2.5mm difference across the dial.

Which has a longer power reserve, the Grand Seiko SBGW306 or the Yema Navygraf Marine Nationale Quartz?

The Grand Seiko SBGW306 carries a 72-hour power reserve against 40 hours on the Yema Navygraf Marine Nationale Quartz.

What movement does the Grand Seiko SBGW306 run compared to the Yema Navygraf Marine Nationale Quartz?

The Grand Seiko SBGW306 runs a manual caliber (9S64), while the Yema Navygraf Marine Nationale Quartz runs a quartz.

Side by side

Grand Seiko SBGW306vsYema Navygraf Marine Nationale Quartz

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

Grand Seiko SBGW306

sbgw306j

MSRP $17,900

Yema Navygraf Marine Nationale Quartz

yema-navygraf-marine-nationale-quartz-ymhfmn39

MSRP $499

At a glance

12 of 29 specs differ

Diameter

SBGW30636.5mm

Navygraf Marine Nationale Quartz39mm

Power Reserve

SBGW30672h

Navygraf Marine Nationale Quartz40h

Water Resistance

SBGW306100m

Navygraf Marine Nationale Quartz100m

MSRP

SBGW306$17,900

Navygraf Marine Nationale Quartz$499

Full specifications

Case

6 specs

Crystal & Dial

2 specs

AR Coating

Yes

Inner

Dial Color

Black

Standard

Movement

3 specs

Caliber

9S64

—

Type

Manual

Quartz

Power Reserve

72h

40h

Pricing

1 specs

MSRP

$17,900

$499

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