1776-1976 us bicentennial silver proof 3 coin set 1976 3 coin silver proof set 1976 topps walter payton psa 3 1976-s bicentennial 3 piece silver proof set alcoholics anonymous 3rd edition 1976 1976 walter payton psa 3 1976 3 coin silver mint sets 1976 3 piece silver proof set 1976 chevy chevelle laguna s3 1976 bicentennial 3 pc. silver u.s. proof set.