Well, it looks like a standard silver dime, and the weight would seem to confirm that. Stranger things have happened, so who knows. However, I would say that being a 1941 it falls a bit to early for the WWII experimental coins. I would also point out that silver does not seem to have been a metal that the US was worried about for the war effort (i.e. War Nics). I think the only way you would probably ever confirm it is to have it tested for silver, or take it to a expert who might know something more to look for. Checked my Breen's, and find no reference to strikes in alternate metals.