I have 10 99A’s in 375 in my data gathered by googling. Uncommon, but more common than the other 3 you list I think.
I have 23 99-375s and 19 99A 375s in my data, so I think there's a decent chance the two models may not be that much different in total made. Rick, what are your counts?
... and there's the octagon 99Cs; but they weren't cataloged.
