How to Become an Expert Operator - 3rd Edition

Omnigraph Mfg. Co.

Edité par 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. N° de réf. du vendeur t00427

Détails bibliographiques

Titre : How to Become an Expert Operator - 3rd ...

Éditeur : New York c. 1895, New York

Date d'édition : 1895