Hi I'm Joe from Ironton Ohio. I found this License in my yard in Ironton years ago while detecting. Don't know how it got here from Dayton but just wondering if it is a common find in the Dayton area? Its copper and I tried to open up the strap that held it to the bike and the very end of strap broke off so I just left it as is. The copper must have got brittle because of age. Joe.