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In addition to the top line of the various series marked ''Columbus Extra'' the company also produced lower price pens simply marked as ''Columbus'', also identified by a numerical code. In the production of the second half of the '30s stand out among these the [[Columbus 3x|30]] and [[Columbus 55]] lines. Around [[1940]], even if there is who gives the origins to the second half of the '30s, the [[Columbus 25]] was introduced to a compact pen with a  stylized spear-shaped clip using a [[button filler]] system. Although not marked as top line, the pen was provided with very elegant band decorations on the cap, similar to those found on the top models of the ''Columbus Extra'' series.  

In addition to the top line of the various series marked ''Columbus Extra'' the company also produced lower price pens simply marked as ''Columbus'', also identified by a numerical code. In the production of the second half of the '30s stand out among these the [[Columbus 3x|30]] and [[Columbus 55]] lines. Around [[1940]], even if there is who gives the origins to the second half of the '30s, the [[Columbus 25]] was introduced to a compact pen with a  stylized spear-shaped clip using a [[button filler]] system. Although not marked as top line, the pen was provided with very elegant band decorations on the cap, similar to those found on the top models of the ''Columbus Extra'' series.  

[[Image:Columbus-25-Capped.jpg|thumb|left|A [[Columbus 25]]]]

[[File:Columbus-25-MarbledBrown-Capped.jpg|thumb|left|A [[Columbus 25]]]]

Also in the second half of the '30s [[Columbus]] started producing models with transparent celluloid that allow to see the ink level, according to the new trend inaugurated by [[Vacumatic]]. From this this period was the birth of the [[Columbus 112]], a [[plunger filler]] model. In [[1938]] the company obtained a patent ({{Cite patent|IT|288327}}) for a screw piston, which had as a consequence the creation of the [[Columbus 10x|100]] line, equipped with a [[piston filler]] loading system.  

Also in the second half of the '30s [[Columbus]] started producing models with transparent celluloid that allow to see the ink level, according to the new trend inaugurated by [[Vacumatic]]. From this this period was the birth of the [[Columbus 112]], a [[plunger filler]] model. In [[1938]] the company obtained a patent ({{Cite patent|IT|288327}}) for a screw piston, which had as a consequence the creation of the [[Columbus 10x|100]] line, equipped with a [[piston filler]] loading system.  

In [[1942]], during a bombing, the factory in Milan on Via Lamarmora was almost completely destroyed,<ref>this is also why there are strong uncertainties on many dates, because all the archives were lost in that occasion.</ref>, and the production was moved to Lesa, on the shores of Maggiore Lake, with considerable logistical difficulties since the plants were in four different sheds, quite distant from each other. In this period the company merely continued a limited production of existing models without any change or innovation and only in [[1946]], when the company was able to return to Milan, the production was resumed at full capacity.

In [[1942]], during a bombing, the factory in Milan on Via Lamarmora was almost completely destroyed,<ref>this is also why there are strong uncertainties on many dates, because all the archives were lost in that occasion.</ref>, and the production was moved to Lesa, on the shores of Maggiore Lake, with considerable logistical difficulties since the plants were in four different sheds, quite distant from each other. In this period the company merely continued a limited production of existing models without any change or innovation and only in [[1946]], when the company was able to return to Milan, the production was resumed at full capacity.

[[Image:Columbus-134-Open.jpg|thumb|left|A [[Columbus 13x|Columbus 134]]]]

[[File:Columbus-134-Red-Open.jpg|thumb|left|Una [[Columbus 13x|Columbus 134]]]]

In the middle of '40s [[Columbus]] introduces the [[Columbus 13x|134]] model, a big [[lever filler]] pen that was a clear imitation of the [[Eversharp]] [[Skyline]]. The same model was also produced in the [[Columbus 13x|132]] medium size version and in the [[Columbus 13x|130]] small version, for ladies. Again in the '40s a [[piston filler]] model, the [[Columbus 40|40]], was also produced and the [[Columbus 55|55]] had a restyling, becoming a whole line of pens.

In the middle of '40s [[Columbus]] introduces the [[Columbus 13x|134]] model, a big [[lever filler]] pen that was a clear imitation of the [[Eversharp]] [[Skyline]]. The same model was also produced in the [[Columbus 13x|132]] medium size version and in the [[Columbus 13x|130]] small version, for ladies. Again in the '40s a [[piston filler]] model, the [[Columbus 40|40]], was also produced and the [[Columbus 55|55]] had a restyling, becoming a whole line of pens.