It would just be face value, about a dollar, but I'm told so many of these have been counterfeited that they are no longer even recognized as currency.
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Queen Elizabeth one pound
M
Marc's Expert Appraisal
ANA-Certified Numismatist · Hudson Valley Numismatics
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I have a 2017a star note serial number# PL13379668*
It's worth $100.
This coin has a variety of things going on with it. Mainly the date,…
Study any circulated coin and you'll see such things... nothing remarkable here beyond typical circulation wear. read WHAT'S MY TREASURE WORTH!
copper showing through face. factory mistake. 1974
Or post mint damage, which is a likelier explanation. Quarters are 2/3 copper; wear and/or oxidation can lead to this appearance.