Dear Mister Konzelmann, with reference to your request we are informing you as follows. According to our documentation files, the chassis number AR 391006 originally corresponds to an Alfa Romeo Giulia Spider Veloce (101.18), engine series AR 00121, manufactured on the 15th July 1965 and sold on the 25th March 1966 in Wien.
The body colour is red, with black interiors.
As an aside, the car is from the Dayton area, and the seller says that the pilots returning from European service to Wright-Patterson brought a lot of Alfas back with them. This would appear to be one of those cars.... It also looks like it took a long time to ship from Alfa to Vienna, or to sell once it got there. Dan