In order to achieve that goal, Ballester associated to his brother-in-law, engineer Eugenio Molina, to build a plant for the production of automatic weaponry.

Thus "Hispano Argentina Fábrica de Automóviles S.A." (HAFDASA) was devoted to the production of Hispano-Suiza vehicles and motors, and also parts and replacements for this and other automotive, truck, and bus marques.

Nevertheless, the company reached its peak through the powerful imputus by Carlos Ballester Molina, Arturo'son (also Eugenio's nephew), who got a degree in engineering in order to expand the family-owned business.

The “Criollo”, as the truck was called, had the possibility of developing a pulling force of 200 tons in first gear, could move with a load at 60 km/h, had 6 speeds forward and 2 backwards.

[5] The vehicle was tested in military maneuvers carried out in Concordia, Entre Ríos, dragging heavy artillery pieces with their supply of ammunition and personnel (23–24 men with all their equipment), crossing fords of more than 1 meter of water, climbing ravines, and even pulling trucks of 3 to 4 tons each out of a quagmire.

[5] Ballester Molina's experimentation with the Criollo engine led him to build a vehicle prototype developed from a lightened truck chassis.

[5] Encouraged by this success, Ballester Molina experimented in the field of high-end vehicles aimed at a public with greater purchasing power.

From the chassis of Hispano Suiza models from 1932 and 1937, adaptation work began in order to be able to equip them with the own-developed Criollo diesel engines.

Ballester Molina also committed to build a car with a truck chassis which was readapted with an aluminium body inspired on European models.