Dear Tatyana,
I was not available on the Forum for reasons not entirely discussable
I just saw a sword from China that is a Mother of all Piltdown Men: Japanese Kyu Gunto handle, Prussian handguard, swastika with wrong orientation and a blade stamped " soviet". Of course, it had a cupreous this, cowskin that, was eximious and belonged to a housecarl. I could not find a signature by Assadollah, but it will likely be included and available on their 2008 model...
I was sorely tempted to buy it for 99 cents just to have the besr (or worst?) example of the post-Mao private enterpreneurship in China, but shipping was $124
But you are correct, and that was exactly the point of my original post: the forgeries become more and more sophisticated and it is more and more difficult to pinpoint one, even after careful personal inspection... If the market for antique weapons continues to be brisk, we shall see more and more fake creations of exceptional quality.