After his grandfather’s death, it was his nephew Carlo who took over the company and guided it to the success. OISA has always been a family-run company with around 120 employees led by Domenico Morezzi with the support of his grandson Carlo Boggio Ferraris. reveals remarkable production capacities for the technologies available at that time, producing 10,000 movements per month for a total of over four million watches sold and more than ten calibres developed in-house. In the post-war years, the company grew and moved first to Viale Bligny and then, in 1955, to its definitive headquarters at 10 Corso Como. OISA 1937 patented and marketed numerous brands of wristwatches, while at the same time continuing the production of various precision movements such as 13-line, 11-line and 1/5, 10-line and 1/5, 7 and 3/4, 6 and 1/4 calibres, which it supplied to other manufacturers. – Orologeria Italiana Società Azionaria – in 1937 in Viale Regina Margherita in Milan, starting a handcrafted production of movements designed, machined and assembled “in house”, thus creating a unique reality even today. This excellence is the result of long production experience, an enterprise made up of skill, invention and tenacity. OISA 1937 is the brainchild of Domenico Morezzi, Maître Horologer and, so far, remains the only Italian manufacturer of mechanical movements that has ever existed.