First traces of Nettuno's foundation date back to the year 1911.
It is for this reason that is usually referred to as one of Italy's historical brands producing fine writing instruments, perhaps even the first.
In fact a 1911 sketch for an advertising flyer featured the logo, Neptune fountain in Piazza Maggiore in Bologna, Italy.
This makes Nettuno the oldest italian fountain pens manufacturer, at least with regards to the foundation year.
Since January 2018, Nettuno 1911 writing instruments are manufactured in Napoli, Italy, by Maiora pen factory.