That percentage is unusually high for an auction of this kind and indicates the strength of the vintage film poster market.
The value of a film poster is based on the fame of the films and actors, rarity, good condition and design impact.
English director Colin Nutley cast her in the lead of his movie Black Jack in 1990 after spotting her on a film poster.
On his blog, Mr Grillo also published a mocked-up film poster depicting Mr Bersani as a "Dead Man Talking", based on the 1950 Italian comedy, 47 Morto Che Parla.
Last December's Christie's auction in Los Angeles featured one lot that seemed irresistible: a poster for a film of a concert by Blue Oyster Cult and Black Sabbath, two out-of-work heavy-metal rock bands that still stubbornly sell old records to adoring fans.
People sign up to take part and on the day nominations are announced, names are drawn out of a hat and people are split into teams of 13 - the team leader then picks an envelope containing a poster of which film they will be parodying.
He made up a movie poster for the fictitious film, and even took out ads in Hollywood trade papers, announcing the production.
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Thematically speaking, the film is pretty overt about its subtext, putting it right there on the poster.
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One siren poster features Jane Fonda as "Barbarella" in the 1968 erotic science-fiction film.
Whilst acknowledging that he could understand why the poster had caused uproar, he added that he hoped the real debate would be over the film.
The film is hilariously indifferent to the conundrum of the plot the solution may even be found on the poster, for those who care but it is sustained, just about, by the buoyancy of its mood.
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