German artillery or mortar

[paulo]

I watched a video about Stalingrad and in it the Germans were firing a gun or mortar that was very short and squat but the width looked like 16-20 inches. Must have been an enormous shell.
Any idea what it is? Thanks

[Mobhack]

Unit #982 - karl
or 327 & 328?

If not - may be a captured piece.

[paulo]

OK, thanks