Minerva pens were introduced by Omas in the early 1930's as a subbrand. The Minerva Classica series comprised only lever fillers and pens were produced in fancy celluloids with a wide variety of colors and combinations. A few years later, Minerva piston fillers were introduced to meet the demand of the market for more modern filling mechanisms and ink visibility. They were produced in one size only and remained on the market for a very short time; they are today very rare.
The range of colors of Minerva piston fillers comprised gray pearl, tortoise brown, green marbled and black. Gray pearl seems to be the most common while brown, green and black are the rarest.
This pen is not only very rare but it is also a fantastic writer as its nib offers nice flexibility and is very smooth.