How to Become an Expert Operator - 3rd Edition

Omnigraph Mfg. Co.

Edité par New York c. 1895, New York, 1895

A propos de cet article

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.

N° de réf. du vendeur t00427

Détails bibliographiques

• Titre: How to Become an Expert Operator - 3rd Edition
• Éditeur: New York c. 1895, New York
• Date de parution: 1895
• Catalogues du vendeur:
  • Trade Catalogues