Telecommunications

Cipher machine originally intended for business use, but adopted both for high-level German government communication and for military operations.

• Three-ring Enigma cypher machine in wooden transit case, c.1930s.

Wall telephone instrument, c. 1885

• Wall telephone using a Blake transmitter, c. 1885.

Built by the first radio amateur to receive signals from Australia

• Amateur-built short-wave receiver, 1927