Found my first King George colonial half penny tonight. It's toasted but I can make out "Georg" on the left side and part of the lower bust on the front of the coin and the lower part of the seated lady on the back. I can only make out two 7's in the date (x77x) making it around 100 years older than my oldest so far (1878 indian head). Unfortunately, I can only make out the letters/numbers while using a loupe, hence the reason for not pictures.
sadly our PA soil isn't usually friendly to the real old coppers. Many of ours are just copper discs with, as you are seeing, one or two numbers/letters to let u know what they are. Either way, congrats on an oldie!