Hello, I acquired this 1839 Great Britain 6 Pence with a counterstamp which I cannot identify. Has anyone come across the counterstamp before? It partially covers the Six Pence written on coin and appears as a half 8 spoked wheel. I would appreciate any input.
I too don't recognize the cm. However, Gregory Brunk's World Countermarks on Medieval and Modern Coins lists a cm by the German town of Erfurt "used tow types of countermarks: (1) a half wheel, and (2) two half wheels joined at the uncut edges." That's about all I can contribute along with a half hour of "Googling." Good hunting.