I have an error penny with no date (blank) and the L I and B from liberty are missing. It is in real good shape on front side. Ive had it for years, so i know it at least 50, s or 60,s Also on back the memorial appears smeared on the top. I also have another error penny that looks like a third of it was missed by stamp. 1/3 blank other part very clearly stamped. Are these worth anything?
My only advice is look at heritage or other auction houses to see what price error coins like yours are fetching. They can be.