Modifiche

Following the changes in the [[Aurora]] production alsothe [[Olo]] models were renewed in the first half of the '30s, with the introduction of the [[Olo Lusso]], produced in two sizes, large and medium, with the same clip of [[Superna]] attached to the cap with a metal head with a dowel screw. The pen was made of celluloid machined from solid barrel in the same marbled and crossed lines colors of the [[Aurora]] models of the same period and was produced with chrome and golden trim. The ''OLO'' logo was reported or on section or on the body.  

Following the changes in the [[Aurora]] production alsothe [[Olo]] models were renewed in the first half of the '30s, with the introduction of the [[Olo Lusso]], produced in two sizes, large and medium, with the same clip of [[Superna]] attached to the cap with a metal head with a dowel screw. The pen was made of celluloid machined from solid barrel in the same marbled and crossed lines colors of the [[Aurora]] models of the same period and was produced with chrome and golden trim. The ''OLO'' logo was reported or on section or on the body.  

Nella seconda metà degli anni '30 vennero poi introdotti i modelli [[Olo F]] ed [[Olo Gamma]], la prima era una penna sfaccettata, che si rifaceva all'analoga versione della [[Novum]]. La seconda era una penna di linee più diritte, con un fondello con una copertura di metallo. Entrambe prevedevano l'abbinamento di matite meccaniche.  

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.