Hi Marco,
Thanks very much for the information from the Italian side.
19 May 1943
Unfortunately I'm not sure. There might have been a mix-up in the German loss records, or there is the chance that British aircraft were responsible for these losses.
21 May 1943
Unteroffizier Wilhelm Flug of 5./J.G. 51 was killed in a crash at Decimomannu after a combat flight in Bf 109 G-6 WNr. 16 603.
Cheers,
Andrew A.
Air War Publications -
www.airwarpublications.com