My set is a later pressing, from the first half of the 1940s. It's in very nice condition, with minimal surface noise, for the most part. Most of the fugues fit onto one record side, but a few run to two or even three sides. I've merged the parts digitally in those cases.
The longest of the fugues is "Contrapunctus XIV," and Bach left it unfinished, either by design or by chance. It's one of my favorite pieces of music; to me, the ending is a metaphor for the unfinished nature of our lives.
The members of the Roth String Quartet are Feri Roth, Jeno Antal, Ference Molnár, and Janos Scholz. They recorded Art of the Fugue in December, 1934.