To solve the situation concerning the anxiety about inadequacy of armor safety in the at this time greatly armored KV-1 Model 1941, it was thought we would bring the armor security for this turret around a level to 75mm. Whilst the convenience of producing such a thick armor meal ended up being lacking at that time, so an interim solution should be to utilize bolt on armor, 25 mm of degree, bolt on surface from the turret and some the rest for this hull. This kind wound up being often referred to as KV-1s Ehkranami.