Isomantle electric laboratory flask heater with energy regulator Isomantle electric laboratory flask heater 1958
Electric heating mantle with built-in controller, type MR8411 rated 200/250V 60W, by Electrothermal Engineering Ltd., London, 1965-1975 (for use in semi-micro analysis with flasks up to 50ml capacity) Electric heating mantle with built-in controller 1960-1979
Electric heating mantle for several flask sizes- "multi-mantle", replaced by newer model Electric heating mantle for several flask sizes- "multi-mantle" 1964
Electric heating mantle, replaced by newer model Jan. 65. Serial no.139477. Electric heating mantle 1964
Heating mantle, made by Electrothermal Engineering Ltd, Southend-on-Sea, c.1985. Heating mantle circa 1985
Heating mantle serial no.128991 with heating regulator Heating mantle serial no.128991 with heating regulator 1963