Which is cheaper, the Grand Seiko SBGW306 or the Yema Navygraf Marine Nationale CMM.10?

At MSRP the Yema Navygraf Marine Nationale CMM.10 is the cheaper of the two at $1,614, against $17,900 for the Grand Seiko SBGW306 — a $16,286 gap before any retailer discounting.

Which is bigger, the Grand Seiko SBGW306 or the Yema Navygraf Marine Nationale CMM.10?

The Yema Navygraf Marine Nationale CMM.10 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 CMM.10?

The Grand Seiko SBGW306 carries a 72-hour power reserve against 40 hours on the Yema Navygraf Marine Nationale CMM.10.

What movement does the Grand Seiko SBGW306 run compared to the Yema Navygraf Marine Nationale CMM.10?

The Grand Seiko SBGW306 runs a manual caliber (9S64), while the Yema Navygraf Marine Nationale CMM.10 runs a automatic (Yema CMM.10).

Side by side

Grand Seiko SBGW306vsYema Navygraf Marine Nationale CMM.10

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 CMM.10

yema-navygraf-marine-nationale-cmm-10-21-14-55-sn-m

MSRP $1,614

At a glance

12 of 29 specs differ

Diameter

SBGW30636.5mm

Navygraf Marine Nationale CMM.1039mm

Power Reserve

SBGW30672h

Navygraf Marine Nationale CMM.1040h

Water Resistance

SBGW306100m

Navygraf Marine Nationale CMM.10100m

MSRP

SBGW306$17,900

Navygraf Marine Nationale CMM.10$1,614

Full specifications

Case

6 specs

Crystal & Dial

2 specs

Crystal

Sapphire

Domed Sapphire

AR Coating

Yes

Inner

Movement

3 specs

Caliber

9S64

Yema CMM.10

Type

Manual

Automatic

Power Reserve

72h

40h

Pricing

1 specs

MSRP

$17,900

$1,614

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