A Brief History of the Marque
Manufactured by Fratelli Guizzardi of Torino, 1927-1932 
Founded in Turin by Adelmo Guizzardi, previously with Gustavo Patria, the business produced 125cc and 175cc 4T OHV & OHC singles. The machines were quite advanced for the time.
Notes: 1. Sources vary, manufacturing dates possibly 1926-1933
Sources: MC Storico Conti, wikipedia.nl, Tragatsch p153.