This is really interesting!
Could you please provide a link to where you found the picture?
Here are a few links that mention Calcianu and his Alfa, but not much more information I'm afraid:
Romania 1937 1939 - The AUTOSPORT Bulletin Board
Autoturism Homepage
There seem to be no mentioning of Jean Calcianu in Simon Moore's "The Legendary 2.3"
Edit:
But how about this theory of car identity: SF30!
According to Moore this car is lost to history in the end of 1936 when sold to a dealer Ditta A&L Rotondi, Milano. Registration records end there indicating either breaking up of the car or that it was exported.
Time-wise it would tie in with the reported two years of delay in Romanian customs!
A photo of SF30 on page 599 in "The Legendary 2.3" shows a car remarkably similar to the photo in biz5300's post!