They mean it's hard for the untrained eye to see the difference between an Accented Hair and a regular Kennedy half.
Cloud hit it on the head, one of the best lessons you can learn is by selling coins. And now you're gonna hear the best advice I can ever give...
There are several books, the one I use is United States Mint Sets and Proof Sets by Ron Guth and Bill Gale. I believe David Lange wrote another...
There have been several threads, you can find them - HERE
I don't even support using albums, let alone the proceedure using a hammer. ;)
Looks like planchet flaws.
The Unc Buffalos were shipped direct from the mint in sheets of coin flips holding 20 coins. I assume that is the plastic wrapper being referred...
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