No mint mark means Philly. You have a quarter. I see you have a dozen other questions on deck. We offer complimentary appraisals for up to one or two. If I see anything else of note I'll let you know. If not, you can assume face value.
Marc
📋 Item Submitted
1965 I Think No Mint I'm New To This So Not Sure What I'm Looking For Sorry
M
Marc's Expert Appraisal
ANA-Certified Numismatist · Hudson Valley Numismatics
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RED 1966 Washington Quarter No Mint Mark/ Improperly Annealed. BEAUTIFUL ERRORS
Ugly oxidation. Stop copying terms from the Internet.
Look at area under the arm an the buttons on his vest,is this a…
Classic post mint damage.
#1 I believe 1897 that's all I know.#2 1969s #3 1994 date double.
Modern minor varieties don't count for much, you might list on eBay for a fixed $5 and get a bite.