Traded at Battersea, London (1878-1901); Nine Elms Ironworks, Reading (1901-1930s), both England. Traded as Pulsometer Engineering Co. Ltd. from late 1930s, then in 1961merged with the Booker McConnell Group along with another pump company, Sigmund Pumps of Gateshead. This combination created one of the largest pump companies in Europe, which became known as Sigmund Pulsometer Pumps, or SPP for short