Adrian Aeschbacher /
Schubert /
Impromptu No. 4 in A-Flat Major, D. 899
September 30, 1940 in Berlin - Alte Jakobstraße - Raum IX
- ( 1 78 ) Polydor 67 607
- ( 1 78 ) Polydor 67 607 A
February 18, 1953 in Hannover - Hannover Congress Centrum - Beethovensaal
- ( 1 10" ) DG 16 115 HI-FI
- ( 1 LP ) E Collection 29 313
- ( 1 45 ) DG 30 243 EPL