Which is cheaper, the Grand Seiko SBGA384 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 $29,500 for the Grand Seiko SBGA384 — a $27,886 gap before any retailer discounting.

Which is bigger, the Grand Seiko SBGA384 or the Yema Navygraf Marine Nationale CMM.10?

The Grand Seiko SBGA384 wears larger at 40mm versus 39mm for the Yema Navygraf Marine Nationale CMM.10 — a 1mm difference across the dial.

Which has a longer power reserve, the Grand Seiko SBGA384 or the Yema Navygraf Marine Nationale CMM.10?

The Grand Seiko SBGA384 carries a 72-hour power reserve against 40 hours on the Yema Navygraf Marine Nationale CMM.10.

What movement does the Grand Seiko SBGA384 run compared to the Yema Navygraf Marine Nationale CMM.10?

The Grand Seiko SBGA384 runs a spring drive caliber (9R15), while the Yema Navygraf Marine Nationale CMM.10 runs a automatic (Yema CMM.10).

Side by side

Grand Seiko SBGA384vsYema Navygraf Marine Nationale CMM.10

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

Grand Seiko SBGA384

sbga384g

MSRP $29,500

Yema Navygraf Marine Nationale CMM.10

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

MSRP $1,614

At a glance

11 of 29 specs differ

Diameter

SBGA38440mm

Navygraf Marine Nationale CMM.1039mm

Power Reserve

SBGA38472h

Navygraf Marine Nationale CMM.1040h

Water Resistance

SBGA384100m

Navygraf Marine Nationale CMM.10100m

MSRP

SBGA384$29,500

Navygraf Marine Nationale CMM.10$1,614

Full specifications

Case

5 specs

Crystal & Dial

2 specs

Crystal

Sapphire

Domed Sapphire

AR Coating

Yes

Inner

Movement

3 specs

Caliber

9R15

Yema CMM.10

Type

Spring Drive

Automatic

Power Reserve

72h

40h

Pricing

1 specs

MSRP

$29,500

$1,614

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