Bathyscaphe 'Trieste', 1953.

Mitsubishi thermal imaging system, 1989.

Group of component parts for Sargrove sprayed-circuit radio receivers, 1947.

Sargrove sprayed-circuit radio receiver (experimental model) c 1940s.

Sargrove sprayed-circuit radio receiver (experimental model) c 1940s.

Two telephone circuit boards, 1990s.

Main logic asembly board of Commodore PET 2001, 1979.

Skeletal type molecular models, late 20th century.

Cornish Boiler, 1840.

Two printed circuit boards, c 1970s.

Bras standard half bushel volume measure, United States, 1840-1842.

Five printed circuit boards, 1980s.