Roslavets playing his 3rd and 4th sonatas (lost). I'd hope to have a tape recorder so the pieces could be reconstructed.
Ornstein playing his 1st, 2nd, and 3rd sonatas (lost). Tape recorder for reconstruction.
Scriabin, premiere of 5th sonata (people were said to have fallen to his feet)
Scriabin graduation recital (premiere of the 1st sonata)
Scriabin practicing Don Juan, before he injured his hand
Scriabin premier of all other sonatas and piano concerto
Scriabin playing Beethoven's Tempest
Rachmaninov, premier of 2nd sonata
Rachmaninov, premier of 2nd concerto
Rachmaninov, 3rd concerto with Mahler conducting
Rachmaninov, 4th concerto premiere
Rachmaninov graduation recital
Rachmaninov playing Appassionata or Hammerklavier
Horowitz graduation recital (I believe he played the Rachmaninov 2nd sonata)
Horowitz playing for Scriabin as a child
Prokofiev, 2nd concerto premiere
Prokofiev examination with premier of 1st concerto
Prokofiev playing the 3rd symphony of Scriabin for two pianos by himself
Myaskovsky premiers of 2nd and 3rd sonatas
Tcherepnin, premier of 5th concerto (It took him 4 years after he wrote it before he could play it)
Liszt, premier of B minor sonata
Liszt, premier of mephisto waltz
Chopin, premier of 2nd sonata
Beethoven, premier of Tempest and Pathetique sonatas