>>731
https://en.wikipedia.org/wiki/P26/40_tank#Variants
There were at least two planned variants of the P 40, developed from early 1943 when the Italian Army realized that the tank was inferior to other designs such as the German Panther.
The first one was named P 43, a tank with a weight of some 30 tonnes, with armour plates some 50?80 mm thick and a main armament of either the 75/34 gun or a 105/23 gun.
In September 1943 Fiat and Ansaldo began development of a new design which could be comparable to the Panther, and the result was the P 43 bis, with heavily sloped armour, a 450 HP engine and a 90/42 gun.
These designs never passed the wooden mock-up stage

https://forum.warthunder.com/index.php?/topic/390225-identify-this-tank/

P43には2案あったけどどちらもモックアップ止まりでそれ以上の進展はなかった