The 5308 was made during the TESTED XX era but they’re rare, and especially so in mint condition. This ain’t one of them! Telltale signs are:
1. The shield on this one is the open C, short S shield which debuted during the late XX era (rarely seen), became commonplace during the XX U.S.A. era, and is typical of 1970s and early 1980’s dotted knives.
2. The tang shows obvious signs of having been “shaved”. Note the shoulder grind (where the tang meets blade) is not straight across from edge to spine - it curves up into the spine. It should be straight across. Although not as prominent on this one as is often seen in other fakes, it’s still not right.
3. Sambar stag - Sambar not used on Tested XX knives.
4. Condition. Although not a certain give-away, on a knife purportedly this old it should for sure turn your #@*+@ detector on.

Ken