I'd be interested in an evaluation of this precancel which seems to be missing the final "I" in "CINCINNATI":

Here's a hi-res close up of the affected area:

I think I see a printing smear where the final "I" should be. Is this considered an oddity or error?
Also, while on the subject of Ohio precancels, I am coming upon a number of them with the state shown as "OHIO." (with a period after the state name) and seemingly similar style precancels without the period. (The item shown above is one example with the period.) In that the state is not abbreviated, is this just an old style printing or is there a specific precancel variety associated with whether or not a period follows the state name?