The 1950 is a 90% silver Washington quarter, containing about 0.18 troy oz of silver. As a common date it trades essentially at its silver melt — roughly $10–$11 at a recent spot price near $59/oz — with a small premium for an original, problem-free coin. (The scarce 1950-D/S and S/D over-mintmark varieties are the exceptions worth real money.)
Any Washington quarter dated 1964 or earlier is 90% silver; from 1965 on they switched to copper-nickel clad. That silver content is what makes pre-1965 quarters a staple of junk-silver stacking.
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Silver content and melt: Coinflation; melt tracks the live silver price.
I was quite pleased with the quality of coin received. One specifies the desired grade of coin and orders "sight unseen. But the condition of the coin received is as good or better than requested. I will continue to purchase various coins for my collections.