I am concerned about the Frank Caiazzo signature.
I've seen it before and think it's likely legit. The signatures look good to me.
The COA is from 1993, but it looks like it was signed by a 10 year old. Nothing like I recall.
I'm not as comfortable with the autographs as Ballroom is.
I just got home and checked exemplars and Ballroom's better photos. The set looks real to me.
What concerned me most of all was the way "Paul" was written. I didn't recall a U&L of "Paul" that looked like that back then, but a very similar signature was signed in February 1963, which fits in time-wise. I think that the other autographs in the set fit in, too.
Go to Frank Caiazzo's website and send him an email through it with a link to the eBay listing asking if that's his LOA. The signature does look odd compared to the ones I've seen, but he'll be able to tell you.
I see nothing wrong with the signatures.
The sigs look right for the time period...
The signatures look fine,a great piece!!!