Screw cap lid torque tester in box by U G Closures & Plastics Ltd; from the Horlicks factory in Slough Screw cap lid torque tester, from Horlicks factory Unknown
Wratten ink tester for examining tricolour printing inks sold by Kodak Ltd., c.1928 Wratten ink tester for examining tricolour printing inks circa 1928
Meg Insulation Tester 0-100 megohms, 500 volt, fitted on teak base. Meg Insulation Tester 0-100 megohms
"Metrohm" insulation and continuity tester and separate parts to show construction "Metrohm" insulation and continuity tester and separate parts to show construction
Kenley Stiffness Tester in wooden box, designed by Kenley Research laboratories Kenley Stiffness Tester in wooden box
Model 750 Parker Print-Surf paper roughness tester, Manufactured by H.E. Messmer Limited, London England Model 750 Parker Print-Surf paper roughness tester