BT Connected Earth Collection

A collection of historic telecommunications equipment and literature, donated by British Telecom Connected Earth Collection to Bletchley Park Trust, with teleprinter and Morse equipment from the period 1920–70 and books on telegraphy.

Significant objects in the collection include volumes of Bentley’s Complete Phrase Code & the ABC Telegraphic Code and early Creed, Marconi & Hellschreiber equipment.