My son, an Army 2nd LT collects them, I have one, a new shiny Silver Dollar he gave me at his commissioning. He said something about traditions giving a new Silver dollar to. . .
Got one from the CIA in December. I was proud to have been given it. I went to Ebay, and found that you too could have one for under ten bucks. I also have one from Tucson Bomb Appraisal Officers. My collection is two. Gotta start somewhere.