Lincoln cents after 1950 that doesn't carry a mint mark are proofs?? When did they first start producing proofs?
Proof coins have been made for years...there are PF Large Cents...they don't list them in the Red Book and I don't know why---there are PF Morgan dollars....there are PF Trade dollars so Pf's have been made since the 1800's....I'm not sure if any of the coins minted in the late 1700's were proof or not. Speedy
Any genuine US coin without a mint mark was produced at the Philadelphia Mint. with the exception of the first three years of clad coinage - 1965-67 - when the mint was working overtime to replace all the silver coins being pulled from circulation, and left off the Denver and San Francisco mint marks supposedly to reduce the volume of coinage drained from the money supply by those nasty old numismatists.
I dooooo, but it list proofs from 1950s onwards. So I thought maybe the mint started producing proof cents only from 1950s.
Here's the Proof If you have a 1940-S penny it is a SanFranciso business strike. All Proof sets from 1936-1942, 1950-1964 were Philadelphia minted with no "P". Your BU cent sure is nice though, I'd like to have it.