This Museum is very interesting to me because it has one Yugoslav trainer SOKO 522.The only pictures I found of it are these

this is a page from Letectvi+ Kosmonautika from 1984.

Rumcajs do you have pictures of 522 or have you seen it?Do you now in what condition it is now perhaps? It is supposed to be in very good condition, almost ready to fly.

I found this photo of the Soko in the Prague-Kbely´s muzeum, I think the photo is from 2008