This would be the Wurlitzer Tonophone, an early example of a player piano. Powered pneumatically, it featured a system of levers, one corresponding to each key, that "read" a rotating wooden cylinder covered in raised pins.
Wurlitzer sold the Tonophone to restaurants. It was coin-operated, and for five cents patrons could pick one of ten songs. Because songs were so short, they would play through twice.Read More