Fact, literature (and the U.S. mint) state for most years of mint set Lincoln memorials coins (and other mint set singles) are not any different that coins made for circulation. I am not talking about the coins from 1986 to 2001, as the mint did strike these on special presses at denver and I am certainly not talking about satin mint set coins from 2005 to 2009! I am talking about the years the mint claimed no added special measures were taking in mint set singles production verses buisness strike coins! I insist when both coins are BU, I can tell mint set singles from made for circulation type coins in 1959 to date. I also insist I can do it almost every time in any given group or pile of coins. Further I can tell, teach or show you the difference. Probably more experienced collectors who can readily say tell apart proof for mint state and SMS coins - you would need some experience at least. What do you think? Can any of you readily tell the two apart. Do you think the mint at least did something different in coins made for mint sets whether they said so are not? Do you honestly think all those mint set singles we see with the extra glitter, strong strikes and sheen were taken from bins of other buisness type strike coin? I say it's like shooting fish in a barrel. I know others who also know this readily and comment on a coin being from a mint set when they at first have no other clue. One more thing, I don't only know I can tell the two apart and the mint did something different but I'm certain this indeed did happen.