The original 8-back line in most cases came from Taiwan....all of the first editions of 8back figures are from TAIWAN.
There is Battle Armor Skeletor marked USA (but I don't know for no any other figure produced there),
Spain (there are CONOST figures that are not marked "Spain" and have no country marks, and latter produced figures which were not Congost, but they are marked "Spain"),
Italy, Laser Light Skeletor, Laser Power He-Man (they were also produced in Spain but on the figures it is always marked "Italy"), Tytus, Megator and meny of the figures from 1987 were produced in Italy and you can recognize them because they don't have country marks and in most cases if the mold was taken from other country, the name of the country was scratched off so you can see just the "lump" on the place where it should be country mark.
Greece, I know only for Skeletor and Terror Claws Skeletor produced there (no country marks on the figures).
..and there are also LOS AMOS DEL UNIVERSO from Mexico (not the same as the other figures made in Mexico), but also there those from South America: ESTRELA Brasil, ROTOPLAST Venezuela (figures are not marked Venezuela, but in most cases they have marks of those countries from which the mold was taken), TOP TOYS Argentina.
Here is the example of Battle Armor Skeletor from USA, Venezuela (marked "Taiwan" on the figure) and Taiwan: