6th PzD - OOB Question - Stalingrad

[Volcano Man]

Yeah, it looks like it is more likely that this 40 vehicle StuG battalion was a collection of already present units and stragglers, probably not a completely fresh unit. In the case of the 203, it is already present in Armeetruppen.Don, but maybe some other information will turn up to the contrary.

To answer my own question, s.Pz.Abt.503 was not present in the area until ~27 Dec, 1942 which is about seven days beyond the campaign's time frame.