 They had for some years re-conditioned ex-Spanish Civil War light 4x4 trucks, mostly of Italian OM manufacture, and fitted them with diesel engines.The first Mafsa product was a narrow-width truck, with a very elementary cab and either a Barreiros or Perkins engine, specifically designed for the northwestern Spain logging industry, and nicknamed carroceta.As Mafsa had no sales network, the "carrocetas" were only sold from the plant.