I had the Beovox X-35 as Beoworld said they were the original ones for the '80s Beosystem 2000 which I had.
I got a very nice pair but the sound was horrible. My parent's still going Beovox S45 from 1979 sounds way better. I ended up with some other non B&O speakers but keeping the X-35's to keep the system original.
I sold the 2000 system and the seller did not want the better/bigger non B&O speakers but the X-35s with the system. Both were avaible for sale.
Now its Beovox S80.2,S120 in pairs and M150 single pair type which are the bigger brothers. The S45 still sounds in that range. Very pleasent for the ears.