Ed D. writes: I have what looks like a copper US quarter dated 1977. I’m trying to find a value for this coin. Thanks.
Quarters are made from a sandwich of an outer layer of copper-nickel bonded to an inner core of pure copper. Sometimes the sheets of metal are partially missing the bonded layer leaving a pure copper flan. This defect could be caused by gas or dirt coming between the layers of metal when it was rolled out. It is unusual to find a struck quarter with none of the copper nickel present. It could also be a quarter struck on a cent blank, but it would be very thin and the design would be incomplete. I would guesstimate that a quarter struck on a cent blank would bring $60-$100. A quarter struck on a defective quarter flan (pure copper) would bring about $25.