@Shrews1994 https://en.m.wikipedia.org/wiki/Euro_coins And http://dph1701.tripod.com/50quarters/europe.html
people come back from overseas with pocket change and toss it into their coin jars then it goes to bank or coinstar with rest of their change, the machine at my bank has a magnetic strip that pulls out foreign coins, not sure how coinstar rejects them, but they get into circulation, i got this one in change last week...
It is a German Euro cent, worth 1 U.S cent. I have some 1 Euro coins from Germany, but they have an eagle, not a leaf on the back.
ken454 is right, people bring back change from other countries, and thats how these coins from other countries are found in the U.S. Just last week I was somehow given a 1963 silver? Canada quarter in place of a U.S quarter.