San Francisco only minted 40% silver issues as proof strikes 1968-1970 and again in 1976 as a proof and BU strike(both 1976 types are found only in the 3 coin Unc and Proof Bicentennial sets). As a matter of practicality, the only silver halves that you stand a reasonable chance of finding in a bank box are 1964(P), 1964D, 1965, 1966, 1967, 1968D, and 1969D. There were no Philly halves minted 1968-1970 and the 1970D was only included in Mint Sets. For NIFC issues, the 1987P and 1987D were only included in Mint Sets and 2002-present are also NIFC(sold in bags and rolls).



















