Frank How and Co
of Trogon Wharf, Carnwath Road, Fulham
of 77-83, High-street Stratford, London E15 also as Trogon Wharf, High Street, Stratford
1905 Company established by Frank William How
1925 R. Loxley How acted as governing director.[1]
1937 Oil manufacturers. "Trogon" Oils.[2]
1938 'FRANK HOW AND CO., LTD., Trogon Wharf, Carnwath Road, Fulham, (Fulham 2233/4). - Manufacturers of "Trogon" brand of lubricating oils, specialising in "Trogon" aero oils to D.T.D. 109 specification, as supplied to the Air Ministry; also "Trogon" anti-freezing oils, "Trogon" motor oils, and plant and machinery oils in general'[3]