The tapes used were 1st generation tapes, and, by far, the best transfers I heard of these performances.
While browsing through the live recordings I noticed some omissions, for example the Busoni violin concerto with Siegfried Borries from 1949 and the awesome Rapsodie Espagnole (Ravel) from 1948.
And… yes! Audite also restored these recordings. So here is a addenda to the last blog post, the complete RIAS (RADIO STATION) recordings 1948-57 with Sergiu Celibidache as conductor.
Extra info on the performances and track list here and here