1957 they did make proofs in Philadelphia. If your coin is a proof, it is an impaired proof since it has circulated. I put the value between .05 cents and $1 max. The $3 proof value listed in the book would be for an unimpaired proof in top condition. PF 65 +. I've found 2 quarter proofs in circulation. 1972-S and 2004-S Georgia.