Verlag: New York c. 1895, New York, 1895
Anbieter: High Ridge Books, Inc. - ABAA, South Deerfield, MA, USA
24 pp. An interesting training device for prospective telegraphers, the Omnigraph has a dial for spelling out messages which would then be sent in Morse Code. There is also a different machine With a QWERTY-type keyboard for practice in listening to the sounds.