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== External references==
* http://www.pentrace.net/article092801120.html A ''Pen Trace'' article
* http://www.pentrace.net/article092801120.html A ''Pen Trace'' article
* http://www.columbuspenne.it Official web site, containing interesting infos
* http://www.columbuspenne.it Official web site, containing interesting infos
* http://www.italianfountainpenacademy.it/storia/columbus.htm a brand history
* http://www.italianfountainpenacademy.it/storia/columbus.htm a brand history
==Notes==
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