From funnel colours and detail, think the one on the far left might be Empresa Lineas Maritimas Argentinas "Corrientes" or "Salta". Both converted from WW2 escort carriers about 12000grt.
Ran economy service for emigrants Genoa-Buenos Aires.
On the far left the ship is Salta either Corrientes (impossible to say which one), ships belonging to ELMA (Argentinian Flag), former C3 Ships, initially converted to escort carriers, and not Begona either Montserrat who were former "Victory" ships and pretty different from Salta and Corrientes. The ship on the port side of the Leonardo da Vinci, moored aft at "Calata Zingari", is one of the APL cargo liners, the name of the class I'm unluckily forgetting. The other ship moored aft, always at "Calata Zingari", might be a Danish EAC cargo liner (but of this I am not pretty sure). The small ship moored on the East Side of "Ponte dei Mille" (the pier from where, on the West side of it, the Kenya either Rhodesia Castle is sailing) of whom only the funnel is visible, is the "Messapia" (or, eventually her sister "Enotria" of "Adriatica". The picture should have been taken in the first half of 1961 and this can be understood from the "liberty" ships moored aft on the external breakwater of the harbour. I remember perfectly this landscape as at those times I was 10 years old.
Thanks for all that infomation and speculation.
I frequently used to see the Leonardo Da Vinci in New York. Sister ship to the Andria Doria ? wasn't she?. Got sunk by the Stockholm off NY If I remember correctly.
Much better looking ships then the Rafiello ? and her sister.