Thinking it might help in coming to a decision whether someone might find these documents worth having, I list here more information:
"on a note of triumph" is (as mentioned above) a 6 record set, which consists of 12 CBS Broadcasting radio network narratives commemorating V-E Day and the long fight against Fascism, by Martin Gabel, Norman Corwin and composer Bernard Herrmann, with a supporting cast and original score, manufactured by Columbia Masterworks. The broadcast from Hollywood became so popular in 1945 that it was eventually put into book form by Simon and Schuster. The broadcast was only repeated, twice - on 8 and 13 May 1945.
"Winged Victory" is a 2 record set produced by Decca black label records, featuring the Winged Victory Chorus and Orchestra as selections from a play of the same title written and directed by Moss Hart, commemorating the United States Army Air Forces during WWII. The track titles are:
"My Dream Book of Memories"
"The Army Air Corps"
Not many of us still own a record player capable of playing a true 78rpm disc. However, as genuine artifacts of that period 73 years ago, these are valuable and scarce in private collections.