Over 120 black and white photos and 175 patent drawing, charts, diagrams, and schematics trace a century's development of telephones, from Alexander Graham Bell's first box of 1877 to Trimline models from Western Electric. This valuable reference also provides technical information about their electrical circuitry and electrical measurements required to successfully repair, restore, and maintain a collection. Also included are a bibliography, an index, and a price guide for the telephones displayed. This reference is essential for every serious telephone collector, dealer, or restorer.