Good afternoon fellow curious coin nerds I’ve been doing quite well finding interesting coins in scrap cars at the impound lot where I work. Looking up, learning about, and hopes of treasure. Helps to fill my down time, and honestly peaked my interest. Today I found a double headed quarter, with no date, and both D and P mint marks. Did some digging and even after learning that quarters like mine are not all that rare, my curious self needs to know more about double sided coins. I know that Living in Denver I’m naturally drawn to coins from other mints, is it standard for double sided coins to have different mint marks? If there’s no date, how does the government know its circulation time and businesses know it’s legit currency. Also, I’ve read that some/most double sided coins are fakes, has there never been an actual doubled coin minted and sent out ito circulation?