Hello Adriano:
Are you quite sure of your date of 23 August 1943? I noted that the USAAF chronology website shows no USAAF ops in the ETO on that date:
http://paul.rutgers.edu/~mcgrew/wwii...ml/Aug.43.html
Also noted that
The Luftwaffe Over Germany: Defense of the Reich by Caldwell & Muller states that: 'The weakened Eighth Air Force flow only six missions in the 19 days following Schweinfurt-Regensburg (
on 17 August 1943), all to targets in France and the Low Countries'
Regards
Don W