The acetates are unique as they are privately cut acetate records with recordings made by Rosenkrantz himself in New York during the Second World War with famous musicians or recorded from the radio.
Acetaterne er af unik karakter, idet de er privat skårne lakplader med optagelser, som Rosenkrantz selv foretog i New York under 2. verdenskrig med kendte musikere eller optog fra radioen.