On a sidenote, the date itself makes
Johnnie Johnson's identification quite laughable, since Italians received only on April 1943 their first Bf 109s from a very reluctant German ally... go figure if the Luftwaffe would have even lent one Fw 190 to the Italians one year before...!
No mistery, only bad aircraft marking recognition... (anyone remembers the colors described by Clostermann on several FW 190s , including the all-yellow one?)