I like collecting amongst other things, large follis from the Tetrarchy. Curious what you all think happened to the below coin. It's got an odd patina, perhaps repatinated? RIC 29a Ticinum My lighting is a bit harsh, but it does have a yellowish color. My first impression was it had some sort of deposits, but it looks like patina or maybe even painted? Thanks, and love to see your coins with Diocletian.