General (naval engineers) Ferrati, based at La Spezia arsenal, was the designer of the first fast battleship class, the four RN Caracciolo. At the USMM (Italian Navy Historic Office) are stored a set of 9 follows on, in three groups, F, D and G, all based on quadruples 381 turrets.
These project can be seen as responses to the current French naval designs (Normandie, Lyon, Gille, Durand A and B).
The G group, the most compete and satisfying is based on four quadruples 381 towers.
33200 t., 220 l, 16 381/45 (4*4), 24 102/50 in singles.
Design G’ (probably Ferrati’s preferred one):
37200 t., 225 l, 16 381/45 (4*4), 16 170 (8*2), 24 102/50 in singles. Armor 270 and 170mm as in previous designs, with an additional 310 t. for each armor cm added.
(Source: Bollettino d’Archivio, Dic. 1988, A Rastrelli)