
The 1968 coins featuring President John F. Kennedy were made from a 40% silver and 60% copper clad composition. "Proof" coins are specially manufactured coins, struck multiple times with polished dies and planchets to produce a mirror-like finish on the fields and frosted raised areas. They are typically produced for collectors and are not intended for general circulation. Proof coins are usually struck at a specific facility, and for the 1964 issue, the proof versions were also made at the Phil