1976-p Washington Quarter that weighs 6.0 grams is this an error?and is this common ? it's thicker than others.
Quarter: 5.67 grams.. is the normal weight for the US Quarter The weight for your coin seems to be within tolerance. Probably struck on a slightly thicker than usual Planchet. A true overweight would be something like 6.88 Here is an example from my collection -