A Fabbrica Nazionale d'Armi sliding breech patent here

https://ie.espacenet.com/publicationDeta...p;locale=en_IE#

Though the cavalier projection is all over the place, looks like they were contemplating a top lever version.

Couple of model Victor and SuperVictor side lever ads

https://www.iltiro.com/mercatino/mercati...obig=1320431904

https://www.iltiro.com/mercatino/mercati...2&ida=75352

https://www.iltiro.com/mercatino/mercati...&ida=103547

https://www.yabanavmalzemeleri.com/urun/f-n-a-victor-superpoze-av-tufegi-ikinci-el

Google-translated thread with detail pics

https://translate.google.com/translate?hl=en&sl=it&u=http://www.armichepassione.com/forum/viewtopic.php%3Ff%3D62%26t%3D1986&prev=search

Markus