Ya, the Panther "G"s in the snow were a give away too.
Good footages though, though as was said, many are repeats.
I've got one of the Battle of the Bulge with some of the same footages.
That one has the panthers passing those SU-76's also.
I realize Allies share weapons, but I don't recall any SU-76's being used by the Americans.
Enjoy it for what it's worth, but avoid reading the text.

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Morbius, Morbius! Something is approaching from the Southwest. It is now quite close.