Item 9750
Strowger Step X Step
9750.1 Strowger Word
9750.2 Strowger PDF
Original
About this Collection
Outline of the history of the first Automatic Telephone Exchange Systems that were installed across many countries from 1889.
9750.1 Strowger Word
9750.2 Strowger PDF
Original
Outline of the history of the first Automatic Telephone Exchange Systems that were installed across many countries from 1889.