I have a 1971 half dollar that is sealed in a glass diamond. I dont care if its valuble or not but I am curious if anyone has seen something like this? Plus, it looks like Kennedy's head side is gold (plated probably) but the back of it seems to be silver (color). Any ideas on what/where it came from? I work many hours and do not have internet at work,but, I can check e-mail from phone. Thanx