There is a small hope using this path :
In France, there is what we call the "Fond de Moscou", because those files (more than 2 millions of files!) were stolen during the WW2 and then given back in 1990s to the French National Archives
In real those files are multiples -- and you may find several records (from a simple administrative letter, to much much more, including photo, passport (in real limited right to stay in France), etc..
Is Wengelenski the right name to search ? Can you please share as well the first name ?