The following publications are recommended reading for information on your specific areas of interest in the hobby of antique telephony. They can be found on Amazon, eBay or through other internet related searches.
Other educational links:
Old-time Telephones: History, Design, Technology, Restoration (3rd edition)
By Ralph O. Meyer
Bell, Watson, Soft Iron, and the Insight That Commercialized the Magneto Telephone
By Ralph O. Meyer, Dec. 2020
The Telephone and Phone Systems throughout History, by Husain Sumira
In a new book, Bell Telephone System’s Preeminent Role in the Growth of Industrial Design, Ralph O. Meyer and Russell A. Flinchum chronicle the role of the Bell System in the emergence of industrial design as a discipline and compare their telephones with many others. In this article, Meyer sheds light on two of Pratt Institute’s connections to that story.