A roll cage had been added to the car after its arrival in the US. I assume Winkler/VanDerVate had it done. There was a tag riveted to the main hoop, right at the center top. I could not read the whole thing, but I remember it said, "Falls Church, Virginia." And I could make out enough of the wording to tell that it was put there by the guy who did the cage.
Several years after I sold the car, I was reading the preface of a Tilton catalogue where Mac Tilton was recounting his motorsports background. He said that his first big racing success was preparing the Alfa that won the Twelve Hours of Marlboro, when he lived in Falls Church, Virginia! That adds some great additional history to the car.
I ran an ad in The Alfa Owner for the car (1973, I say. I have all of my old Owner issues, but I don't have time to hunt for it now) and sold it to Tom Atkins, or Atkinson, I can't recall. I think he was from Denver. Last I heard (5-7 years ago), he still had the car.