Which is cheaper, the Grand Seiko STGK007 or the Yema Superman Titanium Tourbillon CMM.31 Limited Edition?

At MSRP the Grand Seiko STGK007 is the cheaper of the two at $6,200, against $13,000 for the Yema Superman Titanium Tourbillon CMM.31 Limited Edition — a $6,800 gap before any retailer discounting.

Which is bigger, the Grand Seiko STGK007 or the Yema Superman Titanium Tourbillon CMM.31 Limited Edition?

The Yema Superman Titanium Tourbillon CMM.31 Limited Edition wears larger at 43mm versus 27.8mm for the Grand Seiko STGK007 — a 15.2mm difference across the dial.

Which has better water resistance, the Grand Seiko STGK007 or the Yema Superman Titanium Tourbillon CMM.31 Limited Edition?

The Yema Superman Titanium Tourbillon CMM.31 Limited Edition is rated to 300m versus 100m for the Grand Seiko STGK007.

Which has a longer power reserve, the Grand Seiko STGK007 or the Yema Superman Titanium Tourbillon CMM.31 Limited Edition?

The Grand Seiko STGK007 carries a 50-hour power reserve against 40 hours on the Yema Superman Titanium Tourbillon CMM.31 Limited Edition.

What movement does the Grand Seiko STGK007 run compared to the Yema Superman Titanium Tourbillon CMM.31 Limited Edition?

Both watches run automatic movements — the Grand Seiko STGK007 uses the 9S27 and the Yema Superman Titanium Tourbillon CMM.31 Limited Edition uses the Yema CMM.31 Tourbillon.

Side by side

Grand Seiko STGK007vsYema Superman Titanium Tourbillon CMM.31 Limited Edition

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

Grand Seiko STGK007

stgk007g

MSRP $6,200

Yema Superman Titanium Tourbillon CMM.31 Limited Edition

yema-superman-titanium-tourbillon-cmm-31-limited-edition-12-26-31-65-te-mt

MSRP $13,000

At a glance

13 of 29 specs differ

Diameter

STGK00727.8mm

Superman Titanium Tourbillon CMM.31 Limited Edition43mm

Power Reserve

STGK00750h

Superman Titanium Tourbillon CMM.31 Limited Edition40h

Water Resistance

STGK007100m

Superman Titanium Tourbillon CMM.31 Limited Edition300m

MSRP

STGK007$6,200

Superman Titanium Tourbillon CMM.31 Limited Edition$13,000

Full specifications

Case

7 specs

Crystal & Dial

3 specs

Crystal

Sapphire

Domed Sapphire

AR Coating

Yes

Inner

Dial Color

Black

Titanium

Movement

2 specs

Caliber

9S27

Yema CMM.31 Tourbillon

Power Reserve

50h

40h

Pricing

1 specs

MSRP

$6,200

$13,000

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