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Time delay switch type GW1 MK2

Time delay switch type GW1 MK2

1970-1980
Sun duration sensor, actinometer, by R & D Electronics, 1997

Sun duration sensor, actinometer, by R & D Electronics, 1997

1997
Medresco battery hearing aid, English, 1950-1965

Medresco battery hearing aid

Trophy awarded to the winners of the 2023 Queen Elizabeth Prize for Engineering, Andrew Blakers, Martin Green, Jianhua Zhao and Aihua Wang, for their work on PERC photovoltaic technology.

2023 Queen Elizabeth Prize for Engineering trophy

2023
Leather case for Medresco battery hearing aid, English, 1950-1965

Leather case for Medresco battery hearing aid