Very early mobile radar receiver type RM1, handmade at Bawdsey in 1937 or 1938 Radio Communication 1937-1938
Eastman non-slip printing frame for 5 x 4 negatives patented 21st Aug 1917. Eastman Printing Frame Photographic Technology 1934
Three train, flatbed turret clock by E. Dent with double three-legged gravity escapement, c. 1939. Time Measurement 1939
Hoover "Junior" model 375, 1936 Hoover 'Junior' vacuum cleaner, model 375, 1937. Domestic Appliances 1937
Radar apparatus for the detection of radio echoes from aircraft, used by Robert Watson-Watt in February 1935, England, United Kingdom Radar apparatus used by R.Watson-Watt in 1935 Radio Communication 1935