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at Lombard Street, Southwark, London (1876), business established by Perceval Moses Parsons, the inventor and patentee of Manganese Bronze
1876 Patent on the manufacture of Manganese Bronze.
1879 Business was already making profit from the sale of ingots.
1879 Letter from Mr P. M. Parsons concerning the manganese bronze torpedo boat which had been reported arriving at Portsmouth from The Thames; the plates were thinner than reported in that article and vibration only occurred at certain engine speeds
1880 Patent for improvement in casting copper, bronze, brass under pressure.
1882 Manganese Bronze and Brass Co was registered on 28 June, to acquire the business of P. M. Parsons  for manufacturing manganese bronze and white brass; temporary offices at 3 Walbrook, London EC.