One of my Facebook cohorts found the original source of the image, with a possible solution to the who/where/when.
http://www.classic-r...Eyb0zuUV_6OVzLQ
From the listing:
"The car was sold back in 1948 to the famous rally driver Eugenio Lubich of Triestre (Italy), who raced it very successfully in competition for the first years of its life. See the above attached picture. Mr. Lubich raced with great success with the most greatest Alfa, Ferrari, Maserati, Lancia and other uniques italian cars of all times, like Alfa 6C, Maserati A6GCS, Ferrari 250 Monza, Ferrari 250 TdF, etc…
This is part of the score achieved by Mr Lubich with this vehicle:
17.09.1950 Vittorio Veneto- Cansiglio: 4. Classificato categoria GT
17.06.1951 Trento-Bondone: 2. Classificato categoria GT
24.06.1951 Coppa del Pasubio (VI):4. Classificato categoria GT
08.07.1954 Bolzano- Mendola: 4. Classificato categoria GT
23-26.08.1951 Stella Alpina : 3. Classificato categoria GT
02.09 1951 Vittorio Veneto-Cansiglio
23.09.1951 Trieste-Opicina 3. Classificato categoria GT
30.09.1551 Chiusaforte-Selle Nevea (UD): 3. Classificato categoria GT
22.03.1952 corsa sulle Torricelle (VR) 4. Classificato categoria GT
I don't have a copy of Martin Pfundner's Alpine Trials and Rallies to verify my hunch, but I'm thinking it's the 1951 Stella Alpina.