FWIW, I have this as a Citroen P45 with body by Heuliez 1950, showed at the 1949 Paris show, a little confusing, might be the translation.
I also found a similar bodied truck on a Citroen chassis 1949 on another Heuliez history site, below.
Edit: A little more research, and 1949 seems to be the correct year.
Bill
[please no links]