Manganese Bronze Holdings the early 1960s Manganese Bronze Bearings Ltd (as it was then known) was taken over by a Dennis Poore investment vehicle, Villiers Engineering Ltd, a motorcycle company chiefly known for its range of engines, creating Manganese Bronze Holdings Ltd. This company subsequently bought Associated Motor Cycles Ltd, owners of the Norton AJS and Matchless motorcycle brands in 1964. Manganese absorbed part of the Birmingham Small Arms Company in 1973 - which included Carbodies, the Coventry-based London taxicab maker, under chairman Dennis Poore, as part of a rescue plan initiated by the British government. BSA Motorcycles interests trading as Triumph were
Bronze copper, 30% nickel, 12% zinc, 5% lead, and 1% bismuth. It is able to hold a good polish and so is sometimes used in light reflectors and mirrors. Plastic bronze is bronze containing a significant quantity of lead which makes for improved plasticity possibly used by the ancient Greeks in their ship construction. Silicon bronze has a composition of Si: 2.80–3.80%, Mn: 0.50–1.30%, Fe: 0.80% max., Zn: 1.50% max., Pb: 0.05% max., Cu: balance. Other bronze alloys include aluminium bronze, phosphor bronze, manganese bronze, bell metal, arsenical bronze, speculum metal and cymbal alloys. Bronzes are typically very ductile alloys, considerably