I took it to a jewelry store and they said it weighed 11.0 grams. I wonder if they just chunked it on a big scale that didn't weigh to tenths or hundredths because I didn't actually watch them weigh it. I have a gram scale that measures whole grams for cooking and a 64 kennedy will cause it to flicker between 12 and 13, a 69 makes it read 11 and 12. I have two other 72 kennedys which both look normal and they read 11 steady as does this mystery one. At some point, I'll get a better weight measurement, but for now I am satisfied that this coin has no silver in it, but it also doesn't look plated. It is just a whole lot whiter than a regular clad.
I do appreciate all of the good information I get here - so thanks!
- Tony