Are all "S" Ike's 40%? I asked at the bank for any "no space in the till drawer" coins! I got several JFK's none of which were anything. I also got 12 Ike's. Only one was an "S", a 1973. It is very, very different from the others. It's got a mirror quality to it. I know it can't be sold as proof or UC anymore, but was wondering if it's 40%. It is clad and my wife has misplaced my gram scale during a remodeling project here. I know everyone likes pics, these are the best I could do. Also, is there a safe cleaning method to remove the finger oil fingerprints?