How can you tell a gen Swiss ETA 7750 from A7750?

[cougaree]

Typically the A7750 may not have the markings as the Swiss ones do, but have you come across some A7750 with full Swiss markings as well as "Breitling" logos on the rotor? How do you spot the real Swiss ETA7750 25J movement from those Asian copies?

Thanks!

[cougaree]

I kind of found the answer for my own question on WUS.

"Visually, the only way to tell them apart is the shape of the spokes of the balance wheel. The Chinese 7750 has four straight spokes, the ETA has three spoke that flair at the rim."

Any thoughts?

[yodap]

Look at the rotor bearing, and the stamps under the balance.

A7750s don't have any stamps

[cougaree]

Look at the rotor bearing, and the stamps under the balance.

A7750s don't have any stamps

What about the rotor bearing?

Have you come across any A7750 that stamps ETA logo and 7750 under the balance?

Thanks!

[cougaree]

What do you think about these two?

A

B

I can see the rotor differences. The text on the rotor appear to be in different order as well.

Edited July 28, 2009 by cougaree

[yodap]

1st movement:

Decorated ETA7750 with Breitling rotor, it's a 'fake' B13. The real deal has the COSC no. etched on the auto winder bridge.

2nd movement:

Genuine Breitling B17, which is based on a 2824-2, has nothing to do with the 7750.

Currently no A7750 exists with ETA / 7750 stamping.