In 1948 OMAS made one of the most significant invention in the world of the Italian fountain pen production, the 361 model. This pen was the answer to the Parker 51 success. The originality of this more is in the central position of the nib, mounted along pen axis, protected by a cover left open on one side. Depending on the position of the open side, the nib can be almost completely covered over the top, resulting in a rigid writing, or left wide open, allowing a flexible writing. This system was very functional, allowing bot firm and flexible writing, and it seems that Parker tried several times to acquire this patent(nº US-2565667) from OMAS.