It a little bit looks like the part upper the desk of the printing telegraph instrument as it was on oz.typewriter..
http://chroniclingamerica.loc.gov/lccn/sn82015387/1893-09-30/ed-1/seq-1/
https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEiaTC-7Y75inQoGImiuCv2l1-hm2B5juapw80cridgx7KzSrrnPIiVxHzP9baFvNziz953yIjbyaBxD2feXWHtIakH3bYB-ODs7Zb08FDUAC34o2x_g1XJvo636r__IsFv78AuR0O22e_Y/s1600/Anders_Magneto_Printing_Telegraph_Cent_Expo_Ingram_1876_p__293.jpg
oz.Typewriter: On This Day in Typewriter History (XXII):without brass keys though.
? the letters on the keyboard was..
CADMUS' Type-Writing Machine.
https://www.google.com/patents/US127739