The Colombo engine was designed by De Vecchi's Officine Meccaniche. (OM).

-During a visit to the Polytechnic Museum of Turin we could see that the Colombo engine there has a plate that does not contradict that the production was carried out in the Alfa Romeo.

-Neihter is there a record that says it is a Colombo built by Alfa Romeo.

-Unless it is true that De Vecchi & Co. also built them.

"Colombo-Alfa Romeo-De Vecchi"

"Detail of the engine plate marked with an arrow in the previous picture of the engine"

-We see that the Vecchi Mechanical Office is settled in Milano.

-More down it says: "Motore de Aviazione Tipo Colombo D-110".

"Another view of the Colombo D.110"