I agree with RW. There was no such thing as a .308 Jungle Carbine. Since there were very few SMLEs even built in .308, the are chances are about 99% that that rifle was converted to .308 from .303. In addition, MOST of the Jungle carbines that I find aren't even originals, they're earlier model SMLEs that were cut down so I'd say that most likely that rifle was a modified SMLE that was cut down to look like a jungle carbine AND also converted from .303 to .308. It's only value is as a shooter, it has no collector value. If I could shoot it and if it was a good shooter and if it's in good condition I might pay up to $250 for it, otherwise I don't think I'd even bother with it.