Although there are seven other types of awards presented by the Academy (the Irving G. Thalberg Memorial Award, the Jean Hersholt Humanitarian Award, the Gordon E. Sawyer Award, the Scientific and Engineering Award, the Technical Achievement Award, the John A. Bonner Medal of Commendation, and the Student Academy Award), the best known one is the Academy Award of Merit more popularly known as the Oscar statuette. Made of gold-plated britannium on a black metal base, it is 13.5 in (34 cm) tall, weighs 8.5 lb (3.85 kg) and depicts a knight rendered in Art Deco style holding a crusader's sword standing on a reel of film with five spokes. The five spokes each represent the original branches of the Academy: Actors, Writers, Directors, Producers, and Technicians. MGM's art director Cedric Gibbons, one of the original Academy members, supervised the design of the award trophy by printing the design on a scroll. In need of a model for his statuette Gibbons was introduced by his then wife Dolores del Rio to Mexican film director and actor Emilio "El Indio" Fernandez. Reluctant at first, Fernandez was finally convinced to pose nude to create what today is known as the "Oscar". Then, sculptor George Stanley (who also did the Muse Fountain at the Hollywood Bowl) sculpted Gibbons's design in clay and Sachin Smith cast the statuette in 92.5 percent tin and 7.5 percent copper and then gold-plated it. The only addition to the Oscar since it was created is a minor streamlining of the base. The original Oscar mold was cast in 1928 at the C.W. Shumway & Sons Foundry in Batavia, Illinois, which also contributed to casting the molds for the Vince Lombardi Trophy and Emmy Awards statuettes. Since 1983, approximately 50 Oscars are made each year in Chicago by Illinois manufacturer R.S. Owens & Company. In support of the American effort in World War II, the statuettes were made of plaster and were traded in for gold ones after the war had ended.