One thing's for sure. I'm going out of my way to bid on this. I'm making it a goal to have a proof of every type of coin and I've only seen 2 proof halves.
I get them fairly often-- any I don't need for my collection-- I put up for bid. Glad I caught your interest-- I actually asked for more Proof Pennies because you show such an interest-- perhaps I'll get more Kennedy's while I'm at it
Definition: A proof coin is a coin struck using a special, high-quality minting process, and made especially for collectors. Modern proof coins often have mirror-like fields and frosted devices, although proof coins struck prior to the mid twentieth century are often distinguished only by their high quality surfaces. In all cases, the term proof always refers to a type of coin, or the way it was struck, and not to a coin's grade.