I remember reading about one of the first times the Germans had to deal with one of these things. The 50/37's were nothing but door knockers to it, but they finally knocked off the track(s). Two disastrous attempts by engineers to reduce it during the night also failed.
Some 88's were brought up (from wherever they were) to deal with it. The KV-2 got two of them before they could get set up.
One 88 then put two rounds through the back of the turret. End.
I don't remember how many hits it took, or how many weapons/men it took out before it died, but I'm sure they got their money's worth !

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