There is ,of course the pseudo typo, that amused my dear Sis Fin, it was framed on the wall of my office and said
We will win because we are the stronger"
The O was struck through and an insert mark and letter a put below the line.
There is of course the great also pseudo one in Robert Graves essay on swearing, "Lars Porsena" in which he discusses ,at some length, amongst other things the fact that the typeface for F and for S in the past were identical. He ends the essay with the line " and it serves them right the suckers!!!"