This proof coin has a fineness of 0.9 and comes with a Certificate of Authenticity from the U. The set includes a box for safekeeping and the coveted COA, making it a valuable addition to any coin collection. The commemorative design celebrates the Olympic spirit and is a sought-after piece for collectors of American coins. This 1996 set is the rarest of all the Prestige Sets because of their low mintages of just 55,000 sets. And so many sets were cracked open to send out the Olympic Dollar to get graded because that coin is very rare, and the main reason why the set is so rare and valuable.