1917-D Mercury Dime. MS-67 (PCGS). CAC.An absolutely superior example of this early Mercury issue that is one of the very finest known. It is the sole finest example certified by PCGS in this category, tied with just a single coin on the NGC Census. The centers are largely brilliant and pearly, framed by intense rings of rainbow iridescence at the borders. Intensely lustrous and free of any obvious signs of handling. Absolutely gorgeous, it is an essential piece for the most advanced <em>PCGS Set Registry</em> participants. Approval by CAC contributes even more desirability.Ex Heritages sale of January 2007, lot 2703; Heritages sale of August 2007, lot 1012; Heritages sale of May 2009, lot 559; Heritages sale of August 2015, lot 3719.