After the RKO board approved the production of a test reel, Marcel Delgado constructed Kong (or the "Giant Terror Gorilla" as he was then known) per designs and directions from Cooper and O'Brien on a one-inch-equals-one-foot scale to simulate a gorilla 18 feet tall. Four models were built: two jointed 18-inch aluminum, foam rubber, latex, and rabbit fur models (to be rotated during filming), one jointed 24-inch model of the same materials for the New York scenes, and a small model of lead and fur for the climactic plummeting-down-the-Empire-State-Building shot. At least two armatures have survived – one believed to be the original made for the test footage – and are owned by Peter Jackson and Bob Burns. In 2009, one sold for £121,000 ($200,000) at Christie's in London.