0 or O
Thank you for the reply, Roger. I was leaning toward 79 as opposed to 89, myself. Sounds like it was made a little before Halloween!
As far as the O, I was referring to the serial number (located on the rear left dropout, btw) vs the headbadge number. I was looking at some websites and they all say they didn't use an I or O (as in Ohio) because it might look like a one or zero. But it's definitely an "I". I don't know.
Might this have been built in Chicago?