Most of these are counterstamped twice...one stamp on each side. Some though have a number stamped on the reverse in place of R. Thies. I've only seen one or two like that. Bruce
Hard to say, Raizac, but probably by Thies himself. Most examples have R. Thies on both sides, but the few that don't seem to have a number in place of the name on the reverse. Bruce
I got one in pocket change with both sides stamped here recently though it doesn't interest me collection wise