Something damaged the teeth on that cluster gear. Did a previous repair already replace the 1st / reverse slider gear? If not the slider probably has matching damage.
John, I have the book. Just miss read the catalog drawing. The 1st/Revers looks good.
Lots of wear, but still usable, although I wouldn't (reuse it). That transmission seems to have had plenty of miles on it.
Well, if your cluster gear is trashed, make a lamp out of it! This one is from a '34 3 speed.