When Costante Sesino was founded in 1919 by the Sesino brothers, it initially operated in the business of repairing car grilles and radiators. In the postwar years – after various vicissitudes – its main activity was the construction of radiators for cars, trucks and tractors, for the spare parts market. In the mid-1950s the company decided to diversify its activities, and was the first in Italy to manufacture air-oil and water-oil heat exchangers for the emerging fluid power technology sector.