Roller Organ hand-operated mechanical musical instrument, 17 cobs.Manufactured from the late 1880s through the 1920s. Original hand crank. Original finish. Cobs are the rolls of wood that play music on these instruments, with small brass nails placed strategically to produce a song as it rolls and strikes the keys; an internal bellows simultaneously charges the system, giving the affair a raucous, accordion-like sound, Issued: c. 1890 Dimensions: 8.5"H x 12"L x 14.25"W Manufacturer: The Autophone Co. Country of Origin: United States