This is the original prototype quick release mechanism made by Tullio Campagnolo. It was featured in an article in Peloton magazine and photographed by Augustus Farmer. They got to tour the Campagnolo factory and interview Valentino who then showed them a box of Tullio's prototypes. This is a rarely seen piece. The photo has made the rounds on the internet and is amazing! I could not find a link to the original article, it also was a fun read.
One of our readers provided me with the link to the article, thanks! Here it is: Campagnolo factory tour!