68 50th stepside How do I tell?

[68Stepbed]

My uncle has a 68 stepside pickup. I've not seen it, and haven't really taken interest in it, because my uncle, well I don't forsee him doing much with it. I was telling my dad about the 50th anniversary trucks and how they had the special gold and white paint scheme. I was also telling him they made some stepsides, but they're rare. He said my uncle's is painted gold with the white top and still wearing the original paint. It also originally came with a 250 six and auto tranny.

My question is, how do we tell if it's really a 50th anniversary edition?