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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]].  

The production of fountain pens branded ''Olo'' was essentially abandoned after the war.

The production of fountain pens branded [[Olo]] was essentially abandoned after the war.

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