What CEB said. Also, vibrato is not split, meaning you can't turn it on for only 1 manual.
AFAIK, all tonewheel consoles up to B-3 had 91 note generators. Later models had irregular shaped tonewheels for the pedal tones (called "complex" tonewheels) in an attempt to make the pedals more harmonically rich.
My first ever Hammond was an oddball. It was a B-2, (B-3 without percussion) however it also had a generator which had the early smooth tonewheels for the bottom octave. This allowed me to bypass the foldback on the 16' drawbar and bring those deep pedal tones to the manuals. Once I added an Orgonics tube percussion unit, it was a tone monster.
To this day it is a mystery why that generator was in that particular organ. It must have been swapped in before I ever got it. It had been a road organ for early St. Louis musician Tommy Dean - still had his name painted on the fall board.