2-oz & 2.2-oz .999 Silver Extinction Metals/Hard Knox Metals 3-Bar Colab Set. Hard Knox Metals is a micro-mint business based in South Dakota.  Extinction Metals is a micro-mint based in Pennsylvania.  Antique and gunmetal and poured Finish. SOLD out at Mint. Micro mintage of 25. Serial # 18-19. Price is for 4.2-oz 2-bar set