A Brief History of the Marque
Sergio Secondo built racing motorcycles with transverse four-cylinder OHC engines of 350 and 500cc which gained recognition in competition in the post-war years. Later machines had Earle-style forks, a 4LS front brake, swinging arm suspension with dual shock absorbers and a sculpted fuel tank. It was quite a stunning machine.
Sergio Bongiovanni is mentioned in connection with this marque.
Sources: MC Storico Conti et al