Audio-typist, c 1970s.

Line emision spectrum of thallium and sodium.

'Straight through to Europe', BR poster, c 1970s.

Dennis Healey, c 1980s.

Waiter serving male passengers in buffet car, c 1970s.

Ansafone Mk VII telephone answering machine, c 1970.

Ansafone Mk VII telephone answering machine, c 1970.

Couple in sleeping carriage bunk beds on BR train, c 1970s.

Micromatic Radio, c 1970. Micromatic Radio,

Micromatic Radio, c 1970. Micromatic Radio,

John Herschel's drawing of a spectrum, c 1830s.

'The Conveyer Belt of European Economy', poster, c 1970s.