These two sets were created as separate sets for Philadelphia and Denver Mints. They were not sold separately but as one set with coins from both mints. The two Philadelphia sets have been modified to include the Denver coins.
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Move members from this set https://en.numista.com/catalogue/set.php?id=2513 to this set https://en.numista.com/catalogue/set.php?id=2514 then delete this set https://en.numista.com/catalogue/set.php?id=2513
