Kelvin and Hughes Mk 5 miniature "Supersonic" ultrasonic flaw detector serial No. KH3/242. Kelvin and Hughes Mk 5 miniature "Supersonic" Ultrasonic Flaw Detector
Electrical testing equipment used by Bakelite in the 1950s to examine properties of PVC insulation Electrical testing equipment used by Bakelite in the 1950s
Ultrasonic Flaw detector by Kelvin and Hughes Ltd, 1959-1960 Ultrasonic flaw detector, 1956-1960. 1959-1960