UNfound:

I believe this was the pre-production/prototype model of the Munson typewriter. It was invented by Samuel John Seifried of Chicago, Illinois, ca.1889. 

 

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

(I'm also interested in the Munson No.1, No.2 and No.3 models.