Well, it's definitely a 1941-S Large S (Trumpet Tail) FS-501. There is a Large S/S FS-502, but that doesn't seem to be this coin. I think we need a magnified picture of the mint mark on this coin. Here are the 16 Large-S dies listed on Variety Vista:
http://www.varietyvista.com/04a%20J...MMS00201.htm
http://www.varietyvista.com/04a%20J...MMS00201.htm























