Invincibile pens are connected with the personality of Arturo Heinz. His pen factory was located in Naples where he manufactured a wide range of products, such as lever fillers and  other models, like this Invincibile Extra.

The pen is a senior size with a peculiar patented filling mechanism, which is actually a kind of button filling system. Instead of the usual press button, the pen has a metal cylinder to press to activate the pressure bar.

The pen is fitted with a14 ct Warranted nib, grade M.

For more details about this brand, pleas check the blog:

https://www.tenpen.it/article/invincibile-extra-arturo-heinzs-version-watermans-ink-view