About this set: This set also includes both 1873 Proof issues (Closed 3 & Open 3) in PR64RB. It has been assembled to honor my ancestors that labored in the coal mines of Schuylkill County, Pennsylvania. Irish-Catholic immigrants, circa 1865 to Minersville PA, earning about TWO CENTS an hour in the mines. They are the ones that made it possible for me to do this and I will never forget them. Thank you!...William McLaughlin...Great, great grandson of Daniel Gallagher, coal miner.