Actually the CD is issued by Moscow Conservatory (SMC CD0015). Obviously RESO-Garantia sponsored the release. And big letters 'RESO-Garantia presents' on the cover mean that Moscow Conservatory had no funds then while RESO-Garantia had no taste...

I am afraid that Moscow Conservatory still has no funds to go on their series (on a regular basis at least)
No. It is the same recording that was released for the first time on Melodiya LP D 033337 in 1972 ( later on the recording was included in Schubert Melodiya set of Yudina). Arlecchino is supposed to use either of these two LP releases as a source.
The performance was recorded at Malyi (Small) Hall of Moscow State Conservatory by supposedly an All Union Radio team and apparently MSC archive has a copy.
Please do not ask me who is the legal holder
