Great information, I have a holed Pitt halfpenny with some silvering remaining. Wish I had a non holed example but that is what put it in my price range!
"the point of bringing it up is that is does not look anything like the Pitt 1/2 pennies that are silvered. The color and surface is not anywhere near the same. Hopefully I can get pictures to show what I mean!" Interesting. Wonder if different silvering processes leave physical characteristics that can be identified. "PS, the Rosa that was silver washed (I believe the "silver washed" was Mike Hodder's words but dont quote me on that) sold for $37,500 (give or take hammer) in that Stack's auction." Excuse me while I silver wash my Rosa's!
Lcutler, Can you post a pic? I'd like to see it. I'm surprised that more Pitt "halfpennies" aren't holed, given that all but one or two (more?) of the "farthings" are.
I am afraid I am technologically challenged when it comes to posting pictures. When I have more time maybe I can try to sort it out, I would love to share!
I sold one of these a few months ago and it was similar to your's condition. Mine brought in a good half grand, and I think your's should do the same. Very few of these show up on eBay, so you will get many people wanting it. Nice piece!