This was the first model of the Zerograph Telegraph Typewriter. It's successor was designed, less weighty and with a curved keyboard like that of a Hammond. Several of the 2nd model have been found. The Zerograph was invented ca.1895 by Leo Kamm of London.
Read more about the Zerograph here...
Have some info about this typewriter? Have you found it? If yes, please email me at Antikey.Chop@gmail.com