T 19 was the first motorcycle of the company ISO with big wheels (19-inch) and the same engine as that of the Isomoto. It was called "the one with a sidecar," because most of the T 19 was produced with a sidecar. Despite the fact that ISO produced motorcycles in Spain under license from the Italian company ISO Spa., Model T 19 was never made in Italy, and was in-house development of the Spanish company.