Worlds Most Expensive Caviar – RussoBaltique Prix Imperial 1912 was first time presented by DARTZ at Cannes Film Festival, 2o15 at the event’s charity auction, Dartz offered up for sale its RussoBaltique line of vodka, as featured in the hit show House Of Cards (see below), as well as its RussoBaltique Imperial Prix 1912 brand caviar, considered to be among the finest and most expensive in the world. The company often includes the items with the sale of one of its vehicles. Dartz’s visit to Cannes traces the steps of the founders of the original RussoBaltique brand, A. Nagel and V. Mikhailov, who in 1911 left the company’s headquarters in Riga, Latvia to travel to the south of France. They reached their destination in a total 195 hours, giving them an average speed of about 10 mph. And incredibly, they did this while driving a convertible in the middle of winter.