A Brief History of the Italian Marque
The A.G. marque is derived from the initials of the company founders, Amigoni and Guindani, who produced motorcycles in their Cremona workshop in the years 1924-1925 powered by Austrian Puch engines and French Train powerplants. They were successful in hillclimbs of the day.
Sources: Sito Ufficiale Moto di Lombardia