Hello,
Currently on ebay are the following photos of Italian operated FBA Type H flying Boats:
https://www.ebay.it/itm/RARA-AVIAZIO...0AAOSwefldBNiN
FBA 414 known to have been operated by 255 Squadriglia
https://www.ebay.it/itm/RARA-AVIAZIO...UAAOSw0A9aS4Yp
Regards,
Clint