This is a unique transitional major mint error. In 1989 the Denver Mint struck this Lincoln Cent on a pre-1983 copper Cent blank. The weight is 3.10 grams. It is a transitional since it should be on a copper-zinc blank planchet. This transitional is unique and a discovery coin. It was double struck in the collar and rotated between the strikes. This is one of the coolest mint errors I have ever handled.