1961 Vintage Telephone Systems Planning And Operation Tables Book Siemens

Description

Vintage Telephone Systems Planning And Operation Tables Book Siemens 1961.
Tables for the Planning and Operation of Telephone Systems
This is a book good for telephone  engineering enthusiasts. In the age before easily accessible computers, these tables were important for engineers planning the traffic and load capacity of telephone systems. There's even two pull out charts that help plan systems.
This book has someone's name inside with a little bit of writing on the front page. There's one or two pages that have a few penciled notes. The pocket holding the extra working charts has a little bit of tears
The cover is a blue plastic cover.
Please see pictures for details of condition. Please use the zoom tool if necessary as a pictures are important part of the description.