Which is cheaper, the Grand Seiko SBGD223 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 $320,000 for the Grand Seiko SBGD223 — a $318,386 gap before any retailer discounting.

Which is bigger, the Grand Seiko SBGD223 or the Yema Navygraf Marine Nationale CMM.10?

The Grand Seiko SBGD223 wears larger at 44.5mm versus 39mm for the Yema Navygraf Marine Nationale CMM.10 — a 5.5mm difference across the dial.

Which has a longer power reserve, the Grand Seiko SBGD223 or the Yema Navygraf Marine Nationale CMM.10?

The Grand Seiko SBGD223 carries a 192-hour power reserve against 40 hours on the Yema Navygraf Marine Nationale CMM.10.

What movement does the Grand Seiko SBGD223 run compared to the Yema Navygraf Marine Nationale CMM.10?

The Grand Seiko SBGD223 runs a spring drive caliber (9R01), while the Yema Navygraf Marine Nationale CMM.10 runs a automatic (Yema CMM.10).

Side by side

Grand Seiko SBGD223vsYema Navygraf Marine Nationale CMM.10

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

Grand Seiko SBGD223

sbgd223j

MSRP $320,000

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

SBGD22344.5mm

Navygraf Marine Nationale CMM.1039mm

Power Reserve

SBGD223192h

Navygraf Marine Nationale CMM.1040h

Water Resistance

SBGD223100m

Navygraf Marine Nationale CMM.10100m

MSRP

SBGD223$320,000

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

9R01

Yema CMM.10

Type

Spring Drive

Automatic

Power Reserve

192h

40h

Pricing

1 specs

MSRP

$320,000

$1,614

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