Amazon.com: McDonald's 2018 BIG MAC 50TH ANNIVERSARY COINS - COMPLETE SET OF 5: Toys & Games. Feb 10, 2020 - Shop Men's mcdonalds Red Gold Size OS Other at a discounted price at Poshmark. Description: McDonalds BIG MAC 50th anniversary coin. These commemorative coins feature five unique designs, each representing a decade of the Big Mac. Each MacCoin design pulls in elements from that time in.