Thanks Larry for your usefull answer;
now the related questions stays opened " what is that insignia if not the one of the 443th FS?" (attachement given in following thread about an unknown insigna )
http://forum.12oclockhigh.net/showthread.php?t=26622
probably one fighter squadron flying the P47 in ETO in summer 1944 (before september). Pilot flew in the 358th FG after that date.
Thanks once more for your kind and quick help!
Mathias