Alaska Mint Official 2018 Iditarod Medallion Gold Silver Medallion Proof 1 Oz Comes with Velvet box and COA This is the 2018 Official Alaska Railroad medallion, we mint these in bronze, silver, gold relief, and double gold relief. We have been designing and minting medallions for the Alaska Railroad since 1991, each year there is a new design. This pure silver medallion, with 24k gold highlites on the front, is about the size of a silver dollar, and comes packaged in an airtite container and gift box.