SAN SEBASTIAN — Kevin Iwashina and Ross Dinerstein’s Preferred Content will represent North American distribution rights on Trisha Ziff’s “The Mexican Suitcase.”

Vienna’s Autlook Filmsales has acquired other sales rights outside Spain.

Barcelona-based Mallerich Films Paco Poch and Mexico’s 212Berlin co-produced the docu-feature about a very singular suitcase that contained three boxes in which photographers Robert Capa, Gerda Taro and David “Chim” Seymour hid almost 5,000 negatives taken during the Spanish Civil War in 1936 to 1939. It was found in a closet in Mexico City in 2007.

Trisha has told a modern, relevant and important story for people in modern culture and academia,” Iwashina told Daily Variety.

He said that getting theatrical distribution for docs was challenging. “Television will be a key platform to spread awareness of the film and subject matter,” Iwashina added.

Suitcase” was shot in the U.S., France, Holland and Mexico, and reproduces over 300 photos.

Ziff is currently working on “Pirate Copy,” which examines “the role of artistic rights in modernity,” she said.