UNfound:

The Columbia Music Typewriter was an index machine invented by Charles Spiro, ca.1885. This was the same Charles Spiro that invented the Bar-Lock typewriter, among others. His music typewriter would have been manufactured by the Columbia Type-Writer Company of New York, NY.

Have some info about this typewriter? Have you found it? If yes, please email me at Antikey.Chop@gmail.com