This is an example of an Edison disc player. The popularity of cylinder players peaked in 1905. Columbia stopped producing cylinder players in 1912 and Edison was the last man standing. Noting the popularity of disc players Edison's company secretly worked on a new design that still used his patented hill-and-dale playing method. The new players were introduced in 1911 and made their way to the dealers by 1912.  They were even part of a huge advertising campaign where the player and a performer were placed behind a curtain at theaters around the country and the audience was challenged to tell them apart. In most cases they reportedly could not.