Unfortunately, the package did not arrive. According to the tracking system- I was able to determine that the address was incorrect - the city Rybnik instead of the city Grodzisk Mazowiecki, in Poland.
The order arrived with a very long delay, but it was the mail, not the supplier's fault. In the end, I am content - better to receive late than never. The seller turned out to be reliable.
Definitely not original. The driver looks different inside, the filters are different and there's no tuning foam in the nozzle. As for the sound - nothing like the original, there's a large mid-bass bleed; where the original sounded flat at 250Hz, this sounds like there's +10dB.