[Adriano Baumgartner]

Those are the 13 victories I found, attributed to Lt Wirtgen:
16/09/1943 - B-17 Fortress
11/03/1944 - Spitfire ( NW Nettuno - NO RAF losses according to Nick Beale's site )
17/03/1944 -Spitfire ( SW Rome )
17/03/1944 -Spitfire ( SSW Maritano )
21/03/1944 -Spitfire ( SW Tarquinia )
24/03/1944 -P-47 NW Rome
02/04/1944 -Spitfire
21/06/1944- Spitfire ( W Caen )
23/06/1944- Spitfire
25/06/1944-P-38 ( NW Lisieux )
30/06/1944- P-47
12/09/1944- P-51 ( Wiesbaden )
25/09/1944- Typhoon

Who could point me out the 14th victory?
Yours
Adriano