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<p>[QUOTE="GSDykes, post: 3976605, member: 73321"]How do you know oil was involved?? And yes, toning can be usually be photographed. The very light cents from the period 1983 onwards are due most likely to excess zinc in the mixture, or the copperplating was mixed with some excess zinc, thus becoming a light brassy color. Brass is as you may recall is a mixture of zinc and copper. Whereas bronze is copper and tin. The older cents (1909 - 1940s or so), will display some alloy imbalances, light streaks of zinc or tin. Some collectors really like these early alloyed pieces. A few souls like the lighter brassy colored cents from the later period 1982+, especially if the coin is very pale.</p><p><br /></p><p>First image below by Mike Diamond</p><p><img src="https://www.coinworld.com/images/default-source/news/01_imp_alloy_mix_1941d_1c_obv.tmb-slide-1900.jpg?sfvrsn=6d786ff3_2" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></p><p><br /></p><p>Next image and quote from Coin Talk JIMSKI:</p><p><br /></p><p><i>"According to the mint report on these, they should be classified as a mint</i></p><p><i>error rather than a planchet type. The official explanation is that the</i></p><p><i>planchets were overheated during annealing, resulting in zinc migrating</i></p><p><i>into the copper (thankyou, Alan Herbert)."</i></p><p><br /></p><p>"I had collected 2 brassy colored coins in the late 80s from circulation. I always wondered if they were altered or what. About a year ago, I found the above explanation. It turns out one of the coins was a 83 and the other was a 85-D. I attached pics. I also have a second 83 with a very subtle brassy color."</p><p><br /></p><p><br /></p><p><img src="https://www.cointalk.com/attachments/temp-3-jpg.604968/" class="bbCodeImage wysiwygImage" alt="" unselectable="on" /></p><p>Alles is clear now, yes?</p><p>Gary in Washington[/QUOTE]</p><p><br /></p>
[QUOTE="GSDykes, post: 3976605, member: 73321"]How do you know oil was involved?? And yes, toning can be usually be photographed. The very light cents from the period 1983 onwards are due most likely to excess zinc in the mixture, or the copperplating was mixed with some excess zinc, thus becoming a light brassy color. Brass is as you may recall is a mixture of zinc and copper. Whereas bronze is copper and tin. The older cents (1909 - 1940s or so), will display some alloy imbalances, light streaks of zinc or tin. Some collectors really like these early alloyed pieces. A few souls like the lighter brassy colored cents from the later period 1982+, especially if the coin is very pale. First image below by Mike Diamond [IMG]https://www.coinworld.com/images/default-source/news/01_imp_alloy_mix_1941d_1c_obv.tmb-slide-1900.jpg?sfvrsn=6d786ff3_2[/IMG] Next image and quote from Coin Talk JIMSKI: [I]"According to the mint report on these, they should be classified as a mint error rather than a planchet type. The official explanation is that the planchets were overheated during annealing, resulting in zinc migrating into the copper (thankyou, Alan Herbert)."[/I] "I had collected 2 brassy colored coins in the late 80s from circulation. I always wondered if they were altered or what. About a year ago, I found the above explanation. It turns out one of the coins was a 83 and the other was a 85-D. I attached pics. I also have a second 83 with a very subtle brassy color." [IMG]https://www.cointalk.com/attachments/temp-3-jpg.604968/[/IMG] Alles is clear now, yes? Gary in Washington[/QUOTE]
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