How to Become an Expert Operator - 3rd Edition

Omnigraph Mfg. Co.

Verlag: New York c. 1895, New York, 1895

Beschreibung

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.

Bestandsnummer des Verkäufers t00427

Bibliografische Details

• Titel: How to Become an Expert Operator - 3rd Edition
• Verlag: New York c. 1895, New York
• Veröffentlichungsdatum: 1895
• Verkäuferkataloge:
  • Trade Catalogues