Duro-Ray

of 40/43 Norfolk Street, Strand, London, WC2. Telephone: Temple Bar 3831. Cables Address: "Conglomera, 'Phone, London"

• Majority-owned by Webb's Crystal Glass Co; managed by Duroglass Ltd.

• 1937 British Industries Fair Advert for Permanent Silvering Reflectors. Silvers of Glass Mirrors and Reflectors by Duro-Ray Patent Process. Light reflecting value at 100 per cent. that of pure silver. Guaranteed indefinitely, under any atmospheric conditions, at home or abroad. (Electricity: Industrial and Domestic Section - Stand No. Cb.613)

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