SMS were also issued between 1966-1967. They were intended to replace Proof sets, which had been discontinued by the US Mint in an effort to stop coin hoarding. In 1968, The Mint resumed the issuing of Proofs.
I have also seen the new satin finish mint sets that the mint started to make in 2005 referred to as SMS also. The coins in the mint sets were treated with special dies (If I remember correctly, glass beads to smooth them out.) giving them a smoother finish than regular business strikes.
I have also seen the new satin finish mint sets that the mint started to make in 2005 referred to as SMS also. The coins in the mint sets were treated with special dies (If I remember correctly, glass beads to smooth them out.) giving them a smoother finish than regular business strikes.



















