There is a small patch in a relatively new park that I have found multiple foreign coins in. The search area is only probably 12ft x 30ft, but for some reason they were all collected there and most were at 2 inches or less. I found one like yours along with coins from Singapore, Argentina, England, China, Germany and a few I can't identify. I am guessing that the coins were in the fill dirt that they used to build up the area.