I was referring originally to Klemperer's 1963 studio recording, made in Kingsway Hall, London.
I have four accounts of Klemperer performing M2:
a. 1951 - Live recording w/Concertgebouw Orchestra on a Decca-issue 2-LP set
b: 1951 - LP studio recording on Vox with Vienna Symphony Orchestra
c. 1963 - Studio recording on EMI w/Philharmonia Orchestra on open reel and CD
d. 1965 - Live recording on EMI CD w/chorus & orchestra of Bavarian Radio (Janet Baker)
It's been quite some time since I've listened to all of these. I need to give them a listen again and report back, when I get time (and transfer the two LP recordings to CD-R).
BTW, I have a video of Klemperer performing Beethoven 9. It's too bad that no video was ever made of him doing any Mahler, particularly M2.
Wade