my teacher had a few lessons with him.
Incredible ! One of my teachers, with whom I have studied during four years or so, used to be a pupil of Perlemuter when she was at the Paris Conservatory. The piano world is a small village !
Two stories about Perlemuter: I have seen him in a recital in the early eighties in Paris. He was more than 80, and was constantly at the limit of failure, which made this concert quite a stressing experience - although he had a group of fans absolutely enthusiastic. Also I have met more recently another piano prof here in Nantes who had some contacts with him in the past; he did not keep a very good memory of the man. Hence Perlemuter, who met personnaly Ravel and got advices from the composer about how to interpret his music, thought that he was the only expert in this matter... A last thing I remember about him (from my piano teacher): his obsession to make the highest right-hand fingers sounding, including e.g. in Bach's fugues... Nevertheless, he was certainly a great ravelian pianist, and a great teacher too, having educated generations of professional pianists.