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It seems that ''Edgardo Ercolessi'' was linked by kinship with Eugenio Verga, founder of [[Columbus]] and friendly relations with ''Armando Simoni'' founder of [[Omas]]. Thanks to his knowledge he was able to successfully address the writing instruments market and his company expanded with several stores in Milan, up to the central Corso Vittorio Emanuele. In his activities ''Edgardo Ercolessi'' began to propose in its stores pens explicitly marked with his name. It is unclear whether the origin of this production have been promotional needs or the need to stand out on the market, but in the long the company gave birth to productions with its brand.  

It seems that ''Edgardo Ercolessi'' was linked by kinship with Eugenio Verga, founder of [[Columbus]] and friendly relations with ''Armando Simoni'' founder of [[Omas]]. Thanks to his knowledge he was able to successfully address the writing instruments market and his company expanded with several stores in Milan, up to the central Corso Vittorio Emanuele. In his activities ''Edgardo Ercolessi'' began to propose in its stores pens explicitly marked with his name. It is unclear whether the origin of this production have been promotional needs or the need to stand out on the market, but in the long the company gave birth to productions with its brand.  

Le prime penne marchiate [[Ercolessi]], realizzate agli inizi degli anni '20, erano delle [[rientranti]] in ebanite, sullo stile della [[Waterman 42]], quasi certamente prodotte dalla [[Columbus]]. A queste si aggiunsero in seguito modelli con [[caricamento a levetta]]. A queste seguirono penne in stile [[Duofold]] in celluloide colorata, prodotte presumibilmente, come la gran parte delle penne degli anni '30 a marchio [[Ercolessi]], dalla [[Omas]].  

The first branded pens [[Ercolessi]], built in the early '20s, were hard rubber [[safety]] pens, in the [[Waterman 42]] style, almost certainly produced by [[Columbus]]. To these were added later [[lever filler]] models. To these followed [[Duofold]] style pensin in colored celluloid, presumably produced, as most of the [[Ercolessi]] branded pens of the '30s, by [[Omas]].  

A queste seguirono poi altri modelli, denominati ''[[Ercolessi 5x|Serie 50]]'', derivati dalla [[Minerva Ellittica]] con caricamento a [[pulsante di fondo]] e realizzati nelle stesse misure di questa e con la stessa numerazione, adottata copiando lo [[Numerazione Waterman|schema]] usato dalla [[Waterman]]: la 52½ V (corta e sottile, da signora, ad anello), la  52½ (media e sottile), la 52 (media) e la 55 (grande). Le penne però presentavano, rispetto alla versione originale, una decorazione con tre anellini e diverse colorazioni della celluloide.  

A queste seguirono poi altri modelli, denominati ''[[Ercolessi 5x|Serie 50]]'', derivati dalla [[Minerva Ellittica]] con caricamento a [[pulsante di fondo]] e realizzati nelle stesse misure di questa e con la stessa numerazione, adottata copiando lo [[Numerazione Waterman|schema]] usato dalla [[Waterman]]: la 52½ V (corta e sottile, da signora, ad anello), la  52½ (media e sottile), la 52 (media) e la 55 (grande). Le penne però presentavano, rispetto alla versione originale, una decorazione con tre anellini e diverse colorazioni della celluloide.