1970 D Kennedy Half Dollar Proof-like

Here is the one from the other forum.
Thread here.

 

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It's the commonest cause of a coin being "PL".

Basining is flattening the surface of the reverse image die so that the fields of the coin lie in a single plane. It is called this because they used to use a concave sort of "bowl" to grind these surfaces into a slightly convex shape.

 

i would think "typical" would yield more than only 2 graded DPL (at NGC).

 

Thanks for the opinion.

I'm not extremely familiar with the services. I might undercount a little because I don't like ugly coins even if they are PL so tend to omit them. There is a range of how PL they exist from not PL at all to vaguely PL and (in the case of the '70-D) very PL.

If all these were included starting at vaguely PL then it might be as high as about 4% or so in original mint sets. PL '70-D's have been picked over a little.