FYI.. Not my coin! I wanted to share this neat CoinWeek article on a 1977 Aluminum Cent. Quote - "There are no authorized U.S. coins struck in aluminum for circulation. In 1977, Lincoln Cents were composed of 95% copper and 5% zinc. Since 1982, they have been composed of 97.5% zinc and 2.5% copper." Closed quote https://coinweek.com/coins/error-coins/mike-byers-mint-error-news-unique-1977-lincoln-cent-on-aluminum-planchet/ This is a certified 1974 Aluminum Cent..
While they are different, I have never been a fan of "mint shenanigans" coins. By this, I mean non-authorized off metals, stamping on squares of metal, etc. I own a few, but usually avoid them. It seems the 1970's were simply RIFE with such things around the world. All that I own, (some Thai pieces on square metal), and maybe 80% of all I have seen, are dated in the 1970's. @Fred Weinberg you are an expert in this field, (meaning no disrespect). Do you have an opinion of why so many seem to be dated in the 1970's, or a guess?
Planchet would probably have to have come from strip rolled for 1975 or 1976 Philippines 1 Sentimo coins, most likely 1976. Those were the only two years they were struck in Philadelphia. All the other aluminum Nepal and Philippines coins were struck in San Francisco, An XRF would probably nail it down for sure. The Nepal coins were 100% aluminum, the Philippines coins were 95% aluminum 5% magnesium.
I'm thinking of all the plated Cents and the posts where they think they found a real aluminum Cent that will be in CT.
Seems to be suspicious. Was it found in circulation? Because then it was an accident and a true mint error. As no one who made this intentionally would then toss it into circulation.
