The core of the booklet is a detailed explanation of the “step-by-step” switching system, a technology that began general use in the Bell System around 1919 and was typically employed in smaller localities.
It was issued to a Miss Koralie Lemons. Creases and handling marks are present. Fields such as “EXCH. TRANS.,” and “ORDER NO.”.
This design approach reflects mid-century educational publishing, where clarity and visual appeal were balanced to engage young audiences. WALL SET” requiring a crank to reach an operator, and a “1919.
Softcover manuals with typical age wear and light discoloration. See photos for condition.
The interior pages, crisp and well-preserved, expand upon this introduction with detailed instructions and contextual advertising.
