Yes, mid-20th century sounds right. To get more accurate than that you need to hit the streets and do some serious research on this company. You can search old phone books or business directories to establish when a company was around, but good luck finding any specific info about a small business.
AND...bear in mind this bottle was made by a bottle manufacturer somewhere / anywhere in the world....Italy? another European country? Hard to pinpoint.
It is neat, it is dramatically big. Not much bottle collector value but perhaps some novelty / decorative value.
hope this helps.