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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 Lake Maggiore, 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 Lake Maggiore, 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|Una [[Columbus 13x|Columbus 134]]]]

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

A metà degli anni '40 la [[Columbus]] e introdusse sul mercato la [[Columbus 13x|134]] con [[caricamento a levetta]] e di grandi dimensioni, una chiara imitazione della [[Skyline]] della [[Eversharp]]. Dello stesso modello vengono prodotte anche la versione [[Columbus 13x|132]] di dimensioni medie, e la [[Columbus 13x|130]], piccola, per signore. Sempre negli anni '40 viene prodotta una penna stilografica con [[caricamento a stantuffo]], la [[Columbus 40|40]] ed una ristilizzazione del modello [[Columbus 55|55]] che diventa una intera linea di penne.

A metà degli anni '40 la [[Columbus]] e introdusse sul mercato la [[Columbus 13x|134]] con [[caricamento a levetta]] e di grandi dimensioni, una chiara imitazione della [[Skyline]] della [[Eversharp]]. Dello stesso modello vengono prodotte anche la versione [[Columbus 13x|132]] di dimensioni medie, e la [[Columbus 13x|130]], piccola, per signore. Sempre negli anni '40 viene prodotta una penna stilografica con [[caricamento a stantuffo]], la [[Columbus 40|40]] ed una ristilizzazione del modello [[Columbus 55|55]] che diventa una intera linea di penne.