I am embarrassed to say that I know next to nothing about Benoni Beheyt. I know he was Belgian, and I know he won the World Road Race Championship in 1963. And, errrr, that's it.
I can't even track down a photo that shows what kind of derailleur he was using when he won the Worlds. If anyone has such a photo please let me know!
This particular photo of 'Beni', possibly taken in 1963, is printed on a band used to wrap a Stompkop cigar.