I can send more photos. Just let me know. It is extremely smoothe on the reverse. It has no raised characters or lettering. There may be no error at all. It could be that way because of it’s age.
Based on the pics it appears to be a very well circulated coin at that age I'm sure we will all look like that. IMO Dave
Yeah I am sure it was a nice looking coin at some point in time, is hard to find them in good condition