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Drew-Bear, Perks & Co of 71a, Queen Victoria-street, London.
formerly Rownson, Drew and Co
1900 advert (see inset image) shows office address to be 71a Queen Victoria St., EC, with the works at Prince’s Wharf, Lambeth
1903 Issued pamphlet on street construction issued in connection with the Fire Prevention Exhibition. 
Works address in 1920 was Battersea Steel Works, Wellington Road, SW