Yesterday I went back to the old house that I had found my first walking liberty half, It has rained here and that usually helps the signals come thru better in the bone dry ground.Immediately I found several wheaties and roosie dimes. what I was really hoping for is Mercury dimes, but no luck yet. Checking records it seems that the home was built in 1912 by the first Arizona State veterinarian and occupied by that family til 1935 when the land and home were purchased by the city for a park. In the rear of the home is a structure that was originally a carriage house then garage and office. A few feet to the rear of the carriage house I hit a signal that I believed to be a deep nickel. At about 10 inches I pulled a large disk that was encrusted heavily and took some field cleaning to see what it was. I knew it wasn't a coin. It turned out to be a metal disc that was an early license plate for a motorcycle year 1915! A couple of feet from that I dug another just like it but badly corroded so it could not be read. the first is in good shape and and clear registration number # 600. I have already Contacted our Motor vehicle people to see if records are available for that year and maybe I can actually find out who it was registered to and what kind of motorcycle. I love a find like this that maybe some history can be found. If further info is found I will Post it.