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In this period, placed in the first half of '20s, there was also a change of style, passing from the imitation of Germans model to the American ones. The change is shown by some as a consequence of birth, in 1927, the new Columbus Eugenio Verga, but there are<ref>on the [http://www.columbuspenne.it/COL/antiche/pagine-ita/origini.htm historic section] on the company site the [[Columbus 670]] is dated to 1924, and there is a commercial letter from 1926 were such models are shown.</ref> clear references to pens with this style produced before the separation of Verga brothers.

In this period, placed in the first half of '20s, there was also a change of style, passing from the imitation of Germans model to the American ones. The change is shown by some as a consequence of birth, in 1927, the new Columbus Eugenio Verga, but there are<ref>on the [http://www.columbuspenne.it/COL/antiche/pagine-ita/origini.htm historic section] on the company site the [[Columbus 670]] is dated to 1924, and there is a commercial letter from 1926 were such models are shown.</ref> clear references to pens with this style produced before the separation of Verga brothers.

In the first half of '20s  the [[Columbus 670]] model, very similar to [[Waterman 42]], was introduced. It was produced in three size, normal, thin, and ladies,  and in black, red or [[mottled]] ebonite. The range of available [[overlay]]s was also expanded, form the simple engraving machine were added to decorations or bas gallery and this work became one of the strengths of the company. There is a remarkable production of this pen with an engraving of the star of David on the body of the pen (also listed on the packaging) as a result of an agreement between Columbus and the ghetto in Milan.  

In the first half of '20s  the [[Columbus 670]] model, very similar to [[Waterman 42]], was introduced. It was produced in three size, normal, thin, and ladies,  and in black, red or [[mottled]] hard rubber. The range of available [[overlay]]s was also expanded, form the simple engraving machine were added to decorations or bas gallery and this work became one of the strengths of the company. There is a remarkable production of this pen with an engraving of the star of David on the body of the pen (also listed on the packaging) as a result of an agreement between Columbus and the ghetto in Milan.  

In 1927, when the [[safety]] hard rubber models were too old, the company faced a crisis and broke up. The two brothers separated, ''Alfredo Verga'' founded its own company, the ''[[Omega A.V.M.]]'' while ''Eugenio Verga'', owning of the [[Columbus]] trademark, continued alone creating a personal company with its own name.  

In 1927, when the [[safety]] hard rubber models were too old, the company faced a crisis and broke up. The two brothers separated, ''Alfredo Verga'' founded its own company, the ''[[Omega A.V.M.]]'' while ''Eugenio Verga'', owning of the [[Columbus]] trademark, continued alone creating a personal company with its own name.