This one
http://www.flickr.com/photos/2809206...7625539886908/ is another case of a red spot on a white fuselage band, followed by a wave marking = IV./JG 3 in summer/autumn 1943.
This suggests that it could be one or other of the two such "black 3" found in Southern Italy:
Bf 109 G-6, W.Nr. 18512, Black 3 + red spot and “wave” (previous marking SI+UY) found at Foggia main aerodrome.
Bf 109 G-6, W.Nr. 19461,Black 3 + red spot and “wave” found at Lecce/San Donato.
The only question mark for me would be the white outline to the "3" which is not mentioned in the reports from Italy.