Wiring Diagrams

This is possibly the simplest and shortest page on my site, just a series of links to the wiring diagrams for various mid 20th century (1930s through to 1970s) British Post Office telephones. With a few excursions, such as the US Standard 500 set, and the 1980s British Telecom 87xx series instruments.

Wiring Diagrams:

Tele. 250A Tele. 312 Tele. 330 Tele. 332 Tele. 706 Tele. 711 Tele. 741 Tele. 746 Tele. 8746 Tele. 782 Tele. 8782R AT&T 500

Explanatory Diagrams:

Tele. 250 A Tele. 312 Tele. 330 Tele. 332 Tele. 706 Tele. 711 Tele. 741 Tele. 746 Tele. 8746 Tele. 782 Tele. 8782R AT&T 500


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