German conductor (1888–1965) best known for his performances of Richard Wagner, Anton Bruckner, and Richard Strauss. ALS in German on a 4 x 5.75 postcard, postmarked Vienna, March 21, 1938. Brief letter expressing thanks. In full (translated): “Thank you both loved ones 1000 times. How could you know this? Hope to see you soon.” Scattered soiling, otherwise fine condition. On the day this was postmarked, Knappertsbusch conducted one of the most historically important concerts of his life, leading the Vienna Philharmonic at a festival concert marking the reunification of Austria with the German Empire; the highlight of the night was the performance of Bruckner’s Eighth Symphony. RR Auction COA.