Sharkman, it is the lack of mint documentation that causes skepticism with this piece, and rightfully so. However, there are records from the mint that other denominations were struck as proofs that year at that mint. NGC would have been very thorough authenticating this piece, considering the guarantee implications.
The 1893-cc branch mint proof that I posted earlier came with both mint documentation and an extensive provenance that confirms what it really is.
From the auction description......
This is what is known as a "Class 1" Branch Mint Proof, a coin where there is official mint documentation of the occasion of striking; an honor shared by only the 1879-O, 1883-O, and 1921-S Zerbe. While no one knows for sure how many were struck, the estimate of a dozen goes back to the days of Wayte Raymond, when he theorized these were struck to commemorate the closing of the famed Carson City mint. Over the years, numismatic scholars have expanded on the diagnostics that identify these few 93-CC Branch Mint Proofs, including Wayne Miller who wrote in his 1982, The Morgan and Peace dollar Textbook, describing one of these Proofs: "Although some cameo contrast is evident especially on reverse, this coin is more brilliant than cameo Proof. The fields are deeply mirrored and the strike is very bold. The piece is an obvious Proof at first glance." Most known examples were struck from the VAM-2 die pair, whose diagnostics include traces of recutting on the right side of the 3 in the date, some short die cracks that connect six obverse stars on the left and 3 on the right. A key diagnostic is the downward-right tilt of the CC mintmark. The estimated mintage figure of 12 was repeated by Walter Breen, who enumerated four known examples. In the 2001 Stack's Catalog of the Vermeule Collection, the cataloger enumerated five: Amon Carter; Norweb; Eliasberg (called a "Deep mirror prooflike Gem, Possible Branch Mint Proof); King Farouk; and the Wayne Miller "1972 discovery" coin. Today, the total certified population (includes duplicate submissions, crossovers, etc) list 20 graded between PCGS and NGC in all grades and designations. We know, for a fact, over the years certain coins have been regraded, crossed over and perhaps their owners have yet to return the old inserts, making for a messy Population Report and Census data from the services. While the November 2001 Vermeule catalog does not list a previous pedigree, it is possible that like the FINEST KNOWN 1893-S Morgan dollar that immediately followed this coin, it was obtained directly from the mint, or from the person who did so. In the last decade, there have been four examples graded by PCGS and one NGC coin sold in auction: The Amon Carter coin, sold in our December 2014 auction, graded PCGS PR64 CAC (now a PR65); a PCGS PR64 CAM CAC that sold in August 2011; and this coin, which last sold in the 2012 ANA auction. The Greensboro coin, which was called a Branch Mint "Specimen" struck from a different set of dies (VAM-3, rather than VAM-2), graded SP65 by PCGS sold in the 2013 Central States auction. An NGC PR66 CAM also sold in July 2013.
The 1893-cc branch mint proof that I posted earlier came with both mint documentation and an extensive provenance that confirms what it really is.
From the auction description......
This is what is known as a "Class 1" Branch Mint Proof, a coin where there is official mint documentation of the occasion of striking; an honor shared by only the 1879-O, 1883-O, and 1921-S Zerbe. While no one knows for sure how many were struck, the estimate of a dozen goes back to the days of Wayte Raymond, when he theorized these were struck to commemorate the closing of the famed Carson City mint. Over the years, numismatic scholars have expanded on the diagnostics that identify these few 93-CC Branch Mint Proofs, including Wayne Miller who wrote in his 1982, The Morgan and Peace dollar Textbook, describing one of these Proofs: "Although some cameo contrast is evident especially on reverse, this coin is more brilliant than cameo Proof. The fields are deeply mirrored and the strike is very bold. The piece is an obvious Proof at first glance." Most known examples were struck from the VAM-2 die pair, whose diagnostics include traces of recutting on the right side of the 3 in the date, some short die cracks that connect six obverse stars on the left and 3 on the right. A key diagnostic is the downward-right tilt of the CC mintmark. The estimated mintage figure of 12 was repeated by Walter Breen, who enumerated four known examples. In the 2001 Stack's Catalog of the Vermeule Collection, the cataloger enumerated five: Amon Carter; Norweb; Eliasberg (called a "Deep mirror prooflike Gem, Possible Branch Mint Proof); King Farouk; and the Wayne Miller "1972 discovery" coin. Today, the total certified population (includes duplicate submissions, crossovers, etc) list 20 graded between PCGS and NGC in all grades and designations. We know, for a fact, over the years certain coins have been regraded, crossed over and perhaps their owners have yet to return the old inserts, making for a messy Population Report and Census data from the services. While the November 2001 Vermeule catalog does not list a previous pedigree, it is possible that like the FINEST KNOWN 1893-S Morgan dollar that immediately followed this coin, it was obtained directly from the mint, or from the person who did so. In the last decade, there have been four examples graded by PCGS and one NGC coin sold in auction: The Amon Carter coin, sold in our December 2014 auction, graded PCGS PR64 CAC (now a PR65); a PCGS PR64 CAM CAC that sold in August 2011; and this coin, which last sold in the 2012 ANA auction. The Greensboro coin, which was called a Branch Mint "Specimen" struck from a different set of dies (VAM-3, rather than VAM-2), graded SP65 by PCGS sold in the 2013 Central States auction. An NGC PR66 CAM also sold in July 2013.






















