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Message:: [QUOTE="John Burgess, post: 8171836, member: 105098"]the 1980s DENVER are plagued with plating blisters/bubbles with the zinc changeover in 1982. take a look at the top pops RED cents on PCGS, many of them have blisters. Not so for Philly for some reason.They get it mostly sorted out by 1991-1992. but from 1982-1990 Ds without blisters that had a strong strike, well centered, and exceptional luster just don't really exist. take a good hard look at them on PCGS, it's basically without exception for this date range.<a href="https://www.pcgs.com/pop/detail/category/47?l=lincoln-cent-modern-1959-date&ccid=0&p=MS&sn=3121&pn=3&ps=100" target="_blank" class="externalLink ProxyLink" data-proxy-href="https://www.pcgs.com/pop/detail/category/47?l=lincoln-cent-modern-1959-date&ccid=0&p=MS&sn=3121&pn=3&ps=100" rel="nofollow">https://www.pcgs.com/pop/detail/category/47?l=lincoln-cent-modern-1959-date&ccid=0&p=MS&sn=3121&pn=3&ps=100</a> And here is the Philly 1988 counterpart. even Denver MS69RD's during this time period have plating blisters.[ATTACH=full]1427628[/ATTACH] Not sure why it's like that for Denver, and not Philly, but it's like that for Denver for those years. Maybe different planchet suppliers I guess, but it is a "as struck" characteristic for that period of time for Denver examples.[/QUOTE]