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As for the [[Uhlmann's Eterno]] initial production was mainly of hard rubber pens [[overlay]]s, which are considered among the best ever. It is believed that the company have produced them also on behalf of the most famous companies like [[Columbus]], [[Omega]] and [[Ercolessi]], and also for the Italian branch of the [[Waterman]]. At least this last relationship is well established, existing many examples of such pens.  

As for the [[Uhlmann's Eterno]] initial production was mainly of hard rubber pens [[overlay]]s, which are considered among the best ever. It is believed that the company have produced them also on behalf of the most famous companies like [[Columbus]], [[Omega]] and [[Ercolessi]], and also for the Italian branch of the [[Waterman]]. At least this last relationship is well established, existing many examples of such pens.  

La produzione della seconda metà degli anni '30 era in [[celluloide]], in tre misure con una clip sfaccettata recante l'incisione ''Kosca'' ed una decorazione con una banda a motivi geometrici fra due anellini sottili.

The production of the second half of the '30s was in [[celluloid]], in three sizes with a faceted clip embossed with  ''Kosca'' imprint and decorated with a patterned band between two thin rings.

===Riferimenti esterni===

===Riferimenti esterni===