The link below is to a penny in the imminent Stacks-Bowers auction. It has been slabbed as Proof (with no Peck number) but I have pored through the various obverse and reverse designs of the recorded proof pennies and I believe it to be just a nicely struck currency 10 leaves variety.
https://auctions.stacksbowers.com/lots/view/3-1CB8EP/great-britain-penny-1797-birmingham-soho-mint-george-iii-pcgs-proof-62-brown
However, bidding has already reached $5000.