In order to explain why a 1939 Alfa Romeo racing car appears in the attached photos, it is because the last bodywork that was installed on the Ricart car in this puzzle is after that date and was possibly made in imitation of the Alpha by indications of Ricart himself whose professional activity I summarize below.
Wifredo Ricart (Barcelona 1897-1974) was a genius in engine design and automobile mechanics with special dedication to racing cars. After working in various companies in Barcelona dedicated to the construction of automobiles, he founded his own company in 1926 and before the outbreak of the Spanish civil war he moved to Italy hired by Alfa Romeo where he coincided with Enzo Ferrari who was the Head of the racing team of the brand and Ricart Director of design of the cars, did not get along well because Ricart decided to start building rear-engined racing cars that led Alfa Romeo to be world champion. But Ferrari had already founded his own company. When WWII broke out, Ricart decided to return to Spain and convinced Franco to seize the Hispano Suiza factory in Barcelona, being he appointed Technical Director. Although in principle it was supposed to be dedicated exclusively to manufacturing trucks and weapons, he managed to convince the fascist government to let him design the famous Pegaso Z-102. which in the early '50s were considered the fastest sports cars in the world.