This is why I thought it was a zero and neither of those.

Note how deeply the right side is punched. This explains the light/missing left side of the "0".

Had it been a 2, the lower right line would also be heavily punched. For a 9, the lower right side of the upper circle would also be heavily punched, looking like a backwards E.

It strikes me that there are proper names for all these features on numbers and likely also for letters. I just don't know what those names are.