1972 D Kennedy Silver Clad Error Found

Only conclusive test to separate the coppernickel clad from the silver clad is a specific gravity test. the weights are close enough and the mint tolerances are wide enough that weight is not a conclusive test. A copper nickel clad can weigh as much as 11.79 grams and a 40% silver can weigh as little as 11.1 grams. So any weight between 11.1 and 11.79 could be either one.

SG for for copper nickel clad is 8.92, for the 40% it is 9.53 and it isn't too difficult to do an SG test to an accuracy of +/- .1 (Just make sure you don't trap bubbles on the coin when you do your weight in water.) Getting that second decimal place though is a real bear.

Here ya go mdpmedia

http://www.coincommunity.com/forum/...PIC_ID=39666

The 1965-1970 halves does have a silver rim.
The 1971 forward do have the copper showing except for the silver ones 1992 forward that has the S mint mark on them from Silver proof sets.
There is a test that I use for silver VS clad halves, but the examples must be un toned to tell for sure. There were also a series of silver clad ones in 1976.
But here is the test I was talking about. Use one ply tissue. It may require pulling the two layers apart.

Still No update? It had to be plated as there was no known 72 Silver error, at least yet anyway.