Alfa Owner Club official publication, September 2005, Ed McDonough, writes, “ It’s over 50 years since the cars first appeared at a press launch in October 1952. Relatively few of the cars which became known as “Disco’s” were ever built, and no one really knows how many there were ... One of the final cars in the original Disco shape is listed in the existing records as .00012, but it is also listed as “Unknown” or dismantled, or both. It may have been re-bodied or scrapped.”
That story being told, up for auction is a 1952 Alfa Romeo Disco Valante, VIN # AR13620012.
No more than half a dozen of these things were ever built, and most of the ones which survive rightly live in museums around the world. That this one, known and known lost, should suddenly reappear is simply remarkable. It might be fake, but if it is it's a period fake, made in the 1950s with parts commonly available at that time. I don't know a lot about these cars in particular, but I do know what Alfas from the 50s looked like, and this definitely is one.