John Culshaw (1924-80), Decca producer, photographed (right) with Georg Solti

I assume the Prokofiev, which post-dates Szell’s CBS/Cleveland recording by several years, is from Severance Hall, but as the YouTube poster is Japanese maybe it’s from a tour the Clevelanders made of that country. The Tchaikovsky is a find given Szell (who died in 1970) didn’t record it commercially (as far as I know!).