Now darn it!
First I look at your Romanian SKS post, now this one. Which means I have to go dig up the two Yugo's that I have and find out what year they were made.
These two I know a little more about, well... at least that they are unissued - still in the cosmoline. They are the model with the grenade launcher, disabled with a sleeve tack welded in place. 59/66 right?
I buy these things, pack them away, then forget about them for years and years sometimes. Heck - I found some ammo the other day that I didn't remember I had, then the light bulb went off.... "If I have this ammo... I must have a gun that shoots it right?" Sure enough... CZ52 was found after being forgotten for maybe 6 or 8 years...