Arogers said:
Are the bicentennials what people are calling '76's? If so, how do you tell if it is a silver proof?
Yeah,if someone is calling a half a "76" it is a bicentennial(Could also be for a quarter & dollar too).
The way to tell if it's a silver proof is it must have an "S" mint mark and have no copper on the edge and it will also have the same ring that a 40% half makes when dropped on a surface.
Circulated/damaged proofs are only worth face value,but if you find a silver 76 then it's obviously worth keeping just for the silver content.There are also silver proofs made from '92-present,but they are 90% silver,you will also know these when you see one because of the white,copper free edge.
CU-NI proofs are fairly common(approx 1 per every $500 searched) and since they are damaged,no dealer will buy them from you,since there is no market for them.
I say fairly common because I find them a lot more frequently than 40%er's and I rarely find a 90%er anymore

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