Unfortunately, he probably won't have the answer for the importations of the SKS but I'll give it a try. He was basically an engineer not a businessman or leader of the plant. Post-Communism the country got pretty messy because in 1997 the country collapsed due to a Ponzi scheme and the armories were looted. Post-1997 was much more stable and I doubt he was around then as he immigrated to another Western Euro country.
The serial number ranges or production numbers are definitely a possibility. I was going to write a list of my own questions but I figured its good to get a pool of questions from a larger audience. Sometimes you get questions you don't even think of.
Does anybody on here have PDF copy of the manual "Pushka Gjysem Automatik Model - 1956"? I was hoping to add that to a list of works I could translate but I can't find a copy. So far I got a book about Tanks, the Type 54 pistol, Type 63 Assault Rifle, DP-28, Type 56 LMG (RPD), Tanks, Grenades and Molotov Cocktails and Mortars. To my knowledge I'm missing a manual on the SKS and the AK rifle. And regarding the title, here's a little lesson in Albanian, gjysem translates to "half" so gjysem-automatik literally translates to "half-automatic" which in English we'd just call "semi-automatic"
I could also open up another thread on SKS general usage in the Albanian army where you guys can post questions and I can call them and ask. I have at least two family members that served. One did his two year conscription while the other served for 35 years. He was around through the Soviet aid and then he wasn't able to continue his training in the USSR as we switched ideological camps to the Chinese.