The complete Knappertsbusch ring was recorded by Decca but not released at the time. It is not known if the first 3 parts of the cycle still exist in the Decca archives.
The complete Karajan Ring was recorded by EMI but only Act 3 of Die Walkure was issued. Apparently the rest of the cycle exists on 78s in the EMI archives. Bavarian Radio does not have any of the operas broadcast in 1951 in its archive.