Unique Dual Mint Mark Discovery By Mike Byers for Mint Error News …… Upon closer examination of the understrike on the reverse of the quarter, Jon Sullivan of Sullivan Numismatics discovered and successfully matched up the “D” mint mark. The copper Lincoln cent was originally STRUCK IN DENVER prior to being overstruck by Proof […]
The post Mike Byers Mint Error News – Unique Dual Mint Mark Proof 1776-1976 S Bicentennial Quarter Overstruck on Denver Lincoln Cent appeared first on CoinWeek.