Jeff Mannix 911R--writing the history of ownership
 

I first came across this car 44 years ago while walking near Sunset Strip. It was owned by an actor named Jeff Mannix who wanted to sell it. I shot pictures for Motor Trend.
I am now interested in writing an article about it, but need to now how he got it--did he buy it straight from the factory? Also does anyone know the SN? And if that is the same car owned by Seinfeld now? And is it agreed there is only 10? Thanks for any clues to this old mystery.