This 1991-D John M. Mercanti Signed Korea $1 Commemorative PCGS MS69 is a true treasure for collectors of silver. With a PCGS MS69 rating, this commemorative coin is almost perfect in its condition. Hand-signed by revered coin designer and engraver John M. Mercanti, this limited edition coin is a rare find. The commemorative design honors the celebration of 40 years of peace between South Korea and the United States. This is a truly unique and valuable addition to any collection.