You know about 9 years ago I came into possession of an extensive coin collection, that initially got me into the world of numismatics. I opened a 1975 Proof set that in fact had what I believe to be your dime Sir. I still own the penny & it is partially gold with a sorta rainbow gradient to the copper playing. It is easily assumed to be "another hoax" a bit too quickly if I do say. I think you have a big pay day. Hope you still have!