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[[Image:Omas-PennaDelDottore-Capped.jpg|thumb|left|A "[[penna del dottore]]"]]

[[Image:Omas-PennaDelDottore-Capped.jpg|thumb|left|A "[[penna del dottore]]"]]

But it was only in [[1925]], after having completed the construction of its own factory in Via degli Orbi, that ''Officine Meccaniche Armando Simoni'' were create, whose acronym, [[OMAS]], will become the brand used for the marketed fountain pens. The first relevant model produced by [[OMAS]] was the "[[penna del dottore]]", patented in [[1927]], was an hard rubber [[lever filler]] model with a compartment located inside the barrel of the pen that contained in addition to the sac and the lever mechanism, a thermometer for measuring the fever, kept separate from the rest by a metal partition. The same year Simoni patented the metal joint used for the construction of the [[OMAS]] desk pens, for which the company becomes one of the leading Italian manufacturers.

But it was only in 1925, after having completed the construction of its own factory in Via degli Orbi, that ''Officine Meccaniche Armando Simoni'' were create, whose acronym, [[OMAS]], will become the brand used for the marketed fountain pens. The first relevant model produced by [[OMAS]] was the "[[penna del dottore]]", patented in 1927, was an hard rubber [[lever filler]] model with a compartment located inside the barrel of the pen that contained in addition to the sac and the lever mechanism, a thermometer for measuring the fever, kept separate from the rest by a metal partition. The same year Simoni patented the metal joint used for the construction of the [[OMAS]] desk pens, for which the company becomes one of the leading Italian manufacturers.

The initial [[OMAS]] production of is characterized by various [[Flat top]] [[button filler]] models, clear imitations of the [[Duofold]]. However some of these models were characterized by original technical solutions, as for the second version of the "[[penna del dottore]]" in which again the thermometer was hosted by the body of the pen, or as for the "[[penna del calligrafo]]", which was equipped with a special section that could be easily unscrewed, allowing an easy the change of the nib type, which was directed towards the use by calligraphers.

The initial [[OMAS]] production of is characterized by various [[Flat top]] [[button filler]] models, clear imitations of the [[Duofold]]. However some of these models were characterized by original technical solutions, as for the second version of the "[[penna del dottore]]" in which again the thermometer was hosted by the body of the pen, or as for the "[[penna del calligrafo]]", which was equipped with a special section that could be easily unscrewed, allowing an easy the change of the nib type, which was directed towards the use by calligraphers.