Modifiche

In the second half of the '30s were then introduced the [[Olo F]] and [[Olo Gamma]] models, the first was a faceted pen, going back to the similar [[Novum]] model. The second was a pen with straightest lines, with a metal cover bottom. Both were offered with combination of mechanical pencils.  

In the second half of the '30s were then introduced the [[Olo F]] and [[Olo Gamma]] models, the first was a faceted pen, going back to the similar [[Novum]] model. The second was a pen with straightest lines, with a metal cover bottom. Both were offered with combination of mechanical pencils.  

In the '40s the production was revised, and a new jagged clip was used, not present on [[Aurora]] marked models, but used by the company in other economic production. Moreover, with the introduction in 1938 of ''[[Platiridio]]'' nibs, also ''Olo'' pens were mounted with steel or gold plated steel nibs, marked ''OLO'', which were imprinted in addition to the squared ellipsoid logo also with the production year.

In the '40s the production was revised, and a new jagged clip was used, not present on [[Aurora]] marked models, but used by the company in other economic production. Moreover, with the introduction in 1938 of ''[[Platiridio]]'' nibs, also [[Olo]] pens were mounted with steel or gold plated steel nibs, marked ''OLO'', which were imprinted in addition to the squared ellipsoid logo also with the production year.

In this 1941 [[:File:1941-10-Aurora-Invoice.jpg|invoice]], is mentioned a model called [[Olo Flexor]], produced at least in large and medium sizes. It is not clear to which model it refers. But on a page of a 1940 [[Aurora]] catalog published in the Letizia Jacopini book  there is a ''[[Flexor]]'' pen with a ''"Flexor"'' imprinted nib, next to a very similar [[Atena]] pen. And both have a clip that is substantially identical to the one found on some versions of the [[Summit]] [[Summit serie S.|S. serie]].  

In this 1941 [[:File:1941-10-Aurora-Invoice.jpg|invoice]], is mentioned a model called [[Olo Flexor]], produced at least in large and medium sizes. It is not clear to which model it refers. But on a page of a 1940 [[Aurora]] catalog published in the Letizia Jacopini book  there is a ''[[Flexor]]'' pen with a ''"Flexor"'' imprinted nib, next to a very similar [[Atena]] pen. And both have a clip that is substantially identical to the one found on some versions of the [[Summit]] [[Summit serie S.|S. serie]].