Thank you, I will try to find out.
I do have have letters telling that he's stayed in Berlin for a few months. And he was still in Berlin in August 1943.
Then he left for the front. Unfortunately, my family did not keep all the envelops they received. The last letter he wrote has been stamped 5 days after he died.
In fact, he wrote the letter on 6 december, died on 9 december, and the letter is stamped 14 december 1943. This last letter is only a white/yellow paper, with a Feldpost stamp (no number), and the absender part is not filled in.
In my opinion, this letter might have been posted by someone else after his death.
Later (end of december or early january) my family received a small parcel containing the letters they sent him over the last few months. These letters were probably found in his basement or on his body... There are in front of me when I write these lines, and are very moving as they are covered by blood.
Do you think there a tiny chance to find living veterans from this unit?