Says who? No mark = Philadelphia; they made hundreds of millions.
📋 Item Submitted
It is a 1945 wheat penny with no mint mark...I'm wanting to learn the value of the penny because it's supposed to be super rare
M
Marc's Expert Appraisal
ANA-Certified Numismatist · Hudson Valley Numismatics
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1943penny it weighs 2.90 grams it may be a bronze with
Dear God. 1943 cents are steel. Verify by sticking to a magnet.
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Don't spend it all in one place.
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More like green.. which is what copper does when it corrodes.