Environmental chamber and automatic component measuring system, type ULL-K25-A serial no. 2487-K5102, by Montford Instruments Ltd., Gorst Rd., Ealing, London, NW10, England, 1971-1980, incorporating a Pye Ether 'digi' temperature controller (effective volume of chamber about 300 mm cube, less 50 mm for electrical connectors). Environmental chamber and automatic component measuring system 1971-1980