Showerthought: it took me 3 weeks to figure out my "Roman" coin was a washer from a 1920s tractor
I found it at an estate sale in Ames for $4 and spent 3 weeks measuring its rim and weighing it on a kitchen scale. Every forum said the odd lumpy edge meant it was struck by hand, so I kept reading guides about ancient minting. A guy at the local coin club took one look and pointed out the faint stamped ring on the back, which means it came off a machine. Turns out I had been researching the wrong century entirely. Has anyone else chased a find down a rabbit hole only to learn it was farm junk?