Devotees of New York’s Tribeca Film Festival might consider bidding on the one-of-a-kind Portuguese Automatic that IWC has offered in support of the event. The piece features the company’s Pellaton winding system, a black dial, and distinctive burgundy-shaded seconds and reserve indicators. Proceeds from the sale will support the Tribeca Film Institute, an organization created by the festival’s founders to develop aspiring New York City filmmakers. The watch will be auctioned through Antiquorum at an exclusive…