No, it has a mint mark. Just the wrong one! As I said, in a 1970 uncirculated mint set, the blue one, from Philly, has all the coins you would expect: 1c with no mint mark; 1c with an S mint mark; the dime, quarter and 1/2 d all have the P. The Jefferson nickel has an S mint mark. All still in original US Mint plastic. Comments please. Do they (the grading companies) grade the set in plastic? Thanks. Still working on pic. I am reading how to upload now. CJ