1776 to 1976 half dollar value 1776 to 1976 half dollar error list 1776 to 1976 half dollar no mint mark 1776 to 1976 half dollar value 2022 1776 to 1976 half dollar value d 1776 to 1976 half dollar error 1776 to 1976 half dollar error value 1776 to 1976 half dollar error list value 1776 to 1976 half dollar mint mark location 1776 to 1976 half dollar d mint mark