One-Man Music Machine

A machinery photo for the Vintage Photos Theme Park.

Although this real photo postcard shows what looks like a complicated Rube Goldberg contraption, it actually appears to be some sort of elaborate one-man music machine.

The postcard dealer who sold this to me described the scene simply as a "pipe organ player at keyboard," but upon closer inspection I was able to identify a number of other musical instruments--a guitar, string bass, and bell, for instance--among the pulleys, belts, tubes, and pipes (mouse over the image to see my tentative identifications of some of the instruments).

Although this unique machine seems to be related to the fairground organ, orchestrion, or some other type of mechanical musical instrument, I haven't been able to uncover any specific information about it or the man playing it. Has anyone else ever seen anything like it?

Update: See The Mighty Nelsonian (One-Man Music Machine Mystery Solved).