How to Become an Expert Operator - 3rd Edition

Omnigraph Mfg. Co.

Editore: New York c. 1895, New York, 1895

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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.

Codice articolo t00427

Dati bibliografici

• Titolo: How to Become an Expert Operator - 3rd Edition
• Editore: New York c. 1895, New York
• Data di pubblicazione: 1895
• Cataloghi dei venditori:
  • Trade Catalogues