I have a Yugo M59 (not 59/66), so it's pre-gas-cutoff valve/no grenade launcher with an excellently maintained bore and barrel (that was its main selling point, as it came in just over 3 bills in April).
Apparently it too is a Chetnik Unit original! Unusual grain, coloring; I wondered why the guy's name inscribed had three dots in the 'A' (his name was Dado[?]). Hope he was a better soldier than a woodcarver; it's a pretty hamfisted rendering. The rifle was sold to me as a shooter, and it is. For my size it's light and a perfect carbine, if a little short. Milsupstuff.com has some good, thick screw-in recoil pads that lengthen the stock for us full-sized dudes.
I'm currently refinishing the stock (committed a heinous overspray of polyurethane over a first-rate sanding job, dagnabbit!). Will post pics of Dado's Return when I get it improved...