In late 1881 at the Philadelphia Mint, when the 1882-OS Morgan Silver Dollar obverse dies were being made, a number of reverse dies bearing San Francisco mintmarks were overpunched with the New Orleans mintmark. The reason for this was probably to convert some of the extra, unused S dies for New Orleans Mint use. The 1882-OS is a worthy addition to a collection, and a reasonable goal is obtaining one in MS-63 or MS-64 examples in higher grade are virtually impossible to find. Overall, striking varies from sharp to weak. There is graininess on many coins due to tiny raised dots from light rust pits in the dies. No proofs were minted due to the fact that this was a branch mint.