If by "series D," you mean it has a D mint mark, it's still worth 25 cents.
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CoinTrackers has estimated the 1974 D Washington Quarter value at an average of 25 cents
about 25 cents still.
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If it is still a quarter in 2020 it would be worth a quarter of a dollar.
A quarter is worth 25 cents.
A quarter is worth 25 cents or $0.25.
How can I fine out how much my quarter is worth??
A "Kansas 1861" quarter is worth twenty-five cents. It was actually minted in 2005 as part of a series of quarters representing each of the 50 states in the United States.
If the coin is golden and slightly larger than a quarter, and says 1974-1977, then it's a dollar coin from 2016, and it's worth one dollar.