here's the
broinc.com listing:
Mozart, Piano Concerto #27 [two 'live' performances by Wilhelm Backhaus
and Karl Bohm conducting the Vienna Philharmonic. Rec. 1/29/56 and
8/2/60]. Beethoven, Piano Concerto #4 [two 'live' Wilhelm Backhaus
performances: w.New York Philharmonic/ Guido Cantelli, 3/18/56; w.Vienna
Philharmonic/ Hans Knappertsbusch, 1/17/56]; Piano Concerto #5
'Emperor'. (Three 'live' Wilhelm Backhaus performances: w.Stuttgart
Radio Orchestra/ Joseph Keilberth, 3/17/53; w.Leipzig Gewandhaus
Orchestra/ Franz Konwitschny, 4/20/60; w.Swiss-Italian Radio Orchestra/
Carl Schuricht, 4/27/61)
I haven't listened to mine yet, but I can suggest right off that
the date given for the Kna performance is off by a digit, and is
not 1956 or as the back of the Memories case says 1957, but really
17/January/1954 which is on a number of labels, as is the Cantelli
performance. Or did Knappertsbutsch/Backhaus/Vienna really play a
live performance of the 4th concerto on 1/17/54, 1/17/56 and
1/17/57, spurring my completist urge to look for a 1/17/55.
The other 6 performances are unfamiliar to me.