Which is cheaper, the Grand Seiko STGK007 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 $6,200 for the Grand Seiko STGK007 — a $4,586 gap before any retailer discounting.

Which is bigger, the Grand Seiko STGK007 or the Yema Navygraf Marine Nationale CMM.10?

The Yema Navygraf Marine Nationale CMM.10 wears larger at 39mm versus 27.8mm for the Grand Seiko STGK007 — a 11.2mm difference across the dial.

Which has a longer power reserve, the Grand Seiko STGK007 or the Yema Navygraf Marine Nationale CMM.10?

The Grand Seiko STGK007 carries a 50-hour power reserve against 40 hours on the Yema Navygraf Marine Nationale CMM.10.

What movement does the Grand Seiko STGK007 run compared to the Yema Navygraf Marine Nationale CMM.10?

Both watches run automatic movements — the Grand Seiko STGK007 uses the 9S27 and the Yema Navygraf Marine Nationale CMM.10 uses the Yema CMM.10.

Side by side

Grand Seiko STGK007vsYema Navygraf Marine Nationale CMM.10

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

Grand Seiko STGK007

stgk007g

MSRP $6,200

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

STGK00727.8mm

Navygraf Marine Nationale CMM.1039mm

Power Reserve

STGK00750h

Navygraf Marine Nationale CMM.1040h

Water Resistance

STGK007100m

Navygraf Marine Nationale CMM.10100m

MSRP

STGK007$6,200

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

2 specs

Caliber

9S27

Yema CMM.10

Power Reserve

50h

40h

Pricing

1 specs

MSRP

$6,200

$1,614

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