BUENOS AIRES – from www.hollywoodreporter.com – One of the only two known copies of an alleged porn short film starring a yet unknown Marilyn Monroe will be offered at auction in Buenos Aires, EFE reported Wednesday.

With a starting price of half a million dollars, the item will be the highlight of the first Buenos Aires Film Collecting Fair, which will take place between on August 6th and 7th at the Borges Cultural Centre.

Event promoter Mikal Barsa said in a press conference that “knowing Marilyn’s fans,” he expects the film­ — shot sometime between 1946 and 1947 — to go for at least twice the initial figure. The black and white, six minutes film was owned by a Spanish collector who recently passed away. Barsa had previously commercialized the only other copy of this film, which surfaced in 1997 and was sold to a private collector for $1.2 million in 2001.

Back then, controversy sparked over whether it was Monroe who appeared masturbating and having sex with an unknown man. At the conference, Barsa backed the authenticity of the stag film by producing a 1996 letter from the President of the American Film Institute stating that if that wasn’t Monroe, it must be “her twin sister.” H

e also mentioned documents from the FBI investigating the origin of the film, and a set of jewelry worn by Monroe in the film that is the same as what she wore on other films and photos she did around that time.

Barsa explained how an American officer took these films to France, where they remained stored and forgotten for decades in an antique shop in Paris, until two Spanish collectors unknowingly bought them together with other films, and later discovered the great resemblance of the film’s star with Norma Jean Baker.

Another 16mm stag film supposedly featuring Monroe surfaced in 2008 and was sold for $1.5 million dollars to a New York business man. The 15 minute footage was said to show the star of Gentlemen Prefer Blondes performing oral sex on an unknown man.