Inside Out Library

The practical telephone handbook and guide to the telephonic exchange (1906)

Poole, Joseph · New York, Macmillan Co. · leaf 492

An illustration from The practical telephone handbook and guide to the telephonic exchange, 1906, leaf 492 — Fig. 439.— Silvertown Test Set … AA AA ..^f. . AA 10.000OHMS iIOOOO

Telephone

Internet Archive · Northeastern University Library · Public Domain Mark 1.0. Free to use for anything.

More pictures from The practical telephone handbook and guide to the telephonic exchange

More like this