Physicist, his work led to the development of radar (Radio Detection and Ranging) which played a vital role in the defence of Britain against German air raids in 1940. He was knighted in 1942. Glossy 6.5 x 8.5 photo of Watt on a city street, signed in blue ink, 'Robert Watson Watt, London 1962.' He has also added a short note on the reverse, describing the building behind him, signed 'R. W. W.' In fine condition, with light paperclip impression to right edge. RRAuction COA.
