Seven boys play big Harmonica (Feb, 1932)

Seven boys are needed to play a huge harmonica recently demonstrated at Detroit, Mich., and which is declared to be the largest of its kind in the world. It measures eight feet in length, giving sufficient space for each performer to render the part assigned to him in music orchestrated especially for the big instrument. There are 770 notes in all on the scale of the gigantic mouth organ.
Remember this was back in 1932. Sure had some interesting instruments back then. LINK