Slashed letter O, unslashed letter zero

[Fred Cisin]

On Tue, 26 Apr 2022, Gavin Scott wrote:
> Forgive me, but is this not why we had a place on the coding forms
> explicitly for this purpose, as seen in:
> https://upload.wikimedia.org/wikipedia/commons/1/18/FortranCodingForm.png
> where "Punching Instructions" consisted of example pairs of a writer's
> hand lettered graphic and how it should actually be punched?
> I would have thought this was a fully solved problem from really early on.

WHY did there ever exist any FORTRAN coding sheets WITHOUT that?
(and, YES, there were.)