Back at the sidewalk project. Less than two hours searching over two days. The copper slug was a fooler at first, the diameter and thickness are nearly exactly that of a large cent. Best finds were a 1906 Indian Head cent and a 1918 Buffalo nickel. All these coins were virtually laying on the surface.
I'm Nick A. and I am a metal detector hobbyist in Central Ohio. I have been metal detecting since 1990, and currently use the Minelab E-Trac detector.