Hello, I believe I have a DDO here, but my camera is not that great. But I do notice doubling on the 9. Lmk what you think, zoom in. Thanks View attachment 799445
The effect you see on the bottom of the '9' , as well as smaller effect on the 1 and 4 is caused by a scraping force over them. Most likely a mis-adjusted coin counter machine or an old "penny candy machine", no true DD. Jim