Illuminating Engineering Society, Association of Public Lighting Engineers (Great Britain) · [London] · leaf 244
»EC! TRADE HARK. THE ILLUMINATING ENGINEER (dec. 1921) … EC ELECTRIC LAMPS Of Established Reputationfor all lighting requirements A definite feeling of confidence in the name : OSRAM, existing everywhere, is the strongest assurance you • could have that it is the ! RIGHT Lamp to ;
Lighting
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