(RARE!) Voice of Tchaikowsky & Anton Rubinstein On Edison Cylinder ! (1890)

This Edison phonograph cylinder recording from 1890 was made by Julius Block, a Russian Businessman of German descent (The Old Man with the Umbrella in this video) who became fascinated with the phonograph (and even convinced Tchaikovsky to sign an endorsement). The recording was kept by Block until his death in 1934. His family donated the cylinder (with other cylinders made by Block) in a German Archive after his death. The recording was re-discovered in the Pushkin archive of , Russia in