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During the period between the late '30s and the beginning of the '40s, the company affected, as all other European producers, the effects of the war, and because of economic difficulties and supply shortage a drastic simplification of production was made, using only [[button filler]] and arrow clip on all models. In 1941 the company launched a model produced exclusively for the army, the [[Columbus 29]] that after was also distributed on the overall market.

During the period between the late '30s and the beginning of the '40s, the company affected, as all other European producers, the effects of the war, and because of economic difficulties and supply shortage a drastic simplification of production was made, using only [[button filler]] and arrow clip on all models. In 1941 the company launched a model produced exclusively for the army, the [[Columbus 29]] that after was also distributed on the overall market.

Nel 1942 durante un bombardamento la fabbrica di Milano di Via Lamarmora venne quasi completamente distrutta,<ref>questo è anche il motivo per cui ci sono forti incertezze su molte date, essendo andati persi nell'occasione tutti gli archivi dell'azienda.</ref> la produzione venne spostata a Lesa, sul Lago Maggiore, con notevoli difficoltà logistiche essendo gli stabilimenti suddivisi in quattro diversi capannoni alquanto lontani fra loro. In questo periodo l'azienda si limitò a proseguire una limitata produzione dei modelli esistenti senza nessuna variazione o innovazione e solo nel 1946, quando l'azienda poté tornare a Milano, venne ripresa la produzione a pieno regime.

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|Una [[Columbus 13x|Columbus 134]]]]