Philly Ikes did not carry a mint mark (the P mintmark did not appear on dollars until the Susan B. Anthony in 1979).
Posted 06/23/2014 3:21 pm
But everything I have read states that the type one proofs were done at the Philadelphia mint without an S mark were destroyed and replaced with different one's bearing the S mark. The type 2 was made at the San Francisco mint and all have and S mark. Except for one which was found in a cash register at some department store and is now in a private collection.
