Went looking through my Stalingrad Panzer related documents and photos. Came up with nothing. I found info on all of these units receiving this version/model but nothing related to the assignment of numbers. Out of the units I listed, the 24th Panzer has the most complete surviving record but I found nothing in it either.
I am 99.97% that this assignment/numbering of individual vehicles were made at the Regimental/Battalion level or lower and the majority of these records where destroyed in allied bombing raids.
Russ
www.fireonthevolga.com