Modifiche

While maintaining previous models production the new [[Columbus]] began to put attention in to technical innovations. A new double channel feeder, used on top line models until the 40s, was created, and the company began testing the use of celluloid. The company tried to position themselves on the market aiming to produce pens which were generally of good quality but sold at the lowest prices possible. In [[1929]] a new filling system was patented (on the mechanism is imprinted the {{Cite patent|IT|268327}}, not present in any archive, but the {{Cite patent|GB|334913}} is present), essentially an own version of the [[spoon filler]]. This patent also has a very interesting story, there is in fact a variant of [[1931]], the {{Cite patent|CA|327288}}, that's assigned to the [[Swan|Mabie Todd]] company, that in that period was about to launch its [[leverless]] filler, which creates an unexpected link between these two companies.

While maintaining previous models production the new [[Columbus]] began to put attention in to technical innovations. A new double channel feeder, used on top line models until the 40s, was created, and the company began testing the use of celluloid. The company tried to position themselves on the market aiming to produce pens which were generally of good quality but sold at the lowest prices possible. In [[1929]] a new filling system was patented (on the mechanism is imprinted the {{Cite patent|IT|268327}}, not present in any archive, but the {{Cite patent|GB|334913}} is present), essentially an own version of the [[spoon filler]]. This patent also has a very interesting story, there is in fact a variant of [[1931]], the {{Cite patent|CA|327288}}, that's assigned to the [[Swan|Mabie Todd]] company, that in that period was about to launch its [[leverless]] filler, which creates an unexpected link between these two companies.

[[Image:192x-Columbus-Extra-Flattop-Front.jpg|thumb|left|A ''[[Flat top]]'' style [[Columbus Extra|Extra]] from '20s]]

[[File:1935-Columbus-Extra-Tigre.jpg|thumb|left|A ''[[Flat top]]'' style [[Columbus Extra|Extra]] ]]

Also in [[1929]] the [[Columbus Extra]] line was introduced, using the new filling system. Since then the name ''Columbus Extra'' was used to indicate the high-end production, so under this name were produced a wide variety of different models. Typically all models were further identified by a numerical or literal code. This line, with the same name and the same model numbers, remained in production for about a decade, while undergoing many stylistic and technical changes. Therefore is very difficult to classify with the same name a production that can be highly differentiated.  

Also in [[1929]] the [[Columbus Extra]] line was introduced, using the new filling system. Since then the name ''Columbus Extra'' was used to indicate the high-end production, so under this name were produced a wide variety of different models. Typically all models were further identified by a numerical or literal code. This line, with the same name and the same model numbers, remained in production for about a decade, while undergoing many stylistic and technical changes. Therefore is very difficult to classify with the same name a production that can be highly differentiated.