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Rayspeed' 6 1/2'x8 1/2' x-ray film cassette Science Museum Group © The Board of Trustees of the Science Museum
"Rayspeed" 6 1/2"x8 1/2" x-ray film cassette, by General Electric, USA, fitted with Ilford Intensifying screens and lead mask, supplied by Cuthbert Andrews, Bushey, 1940s