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I found this 1984 $1 mob of roos coin in the latest noodle. It is much shinier than normal. The 2020 $1 mob of roos coin beside It is typical of the most recently released coins I come across and it is nowhere near as shiny. The 1984 coin is not a proof and shows wear and tear typical of circulation. I am just wondering how/why it is so shiny. Could it have been lacquered? I don't think metal polish could produce this effect. Any ideas please?