 The sponson sides had thick plates welded on, to make them thick.The transmission cover was significantly thicker, and a new, more massive T23-style turret with of armor on the sides and rear and a thick flat roof, and a gun mantlet with an additional of armor welded on, which resulted in a thickness of 177.8 mm, was fitted.It was originally to be armed with the 76 mm gun, but the 75 mm was preferred for infantry support and was used.