1904 Morgan Silver Dollar. Proof-63 (PCGS). Rich sandy-gray and steel patina yields to mottled antique silver, reddish-russet and sunset-orange undertones as the surfaces dip into a light. The 1904 is the final regular issue Proof in the popular and widely collected Morgan silver dollar series. It is a key date issue for its type, the mintage of 650 Proofs is the lowest in this series after 1891, in which year the same number of Proofs were struck. From the Abigail Collection. From the Abigail Collection.