If is was a US stock it was likely made in the 40's, I have no idea when the Koreans phased out the carbines from actual use and quit making stocks. The Blue Sky Korean surplus carbines were imported into the US in the 90's and some were as cheap as 150$. The creme of the picks were of course maybe higher. The condition of the Korean guns ran from really nice to pretty worn out. They were in plain cardboard boxes and usually seemed to have old grease on them. Dealers at the gunshows had piles of them so you could pick and choose. The guns were all rearsenaled and the parts were usually all mixed, but sometimes you could get a carbine with major components all of one maker, most often Inland.
Your gun is like your nose, it is just wrong for someone else to pick it for you!