Hamilton H76235131 Khaki Aviation Air Race AutoProduct Overview The Hamilton Khaki Air Race Special Edition, the official timekeeper of the Red Bull Air Race. The orange and black Team Hamilton version reflects the colors of Nikolai Ivanov's racing aircraft. Additionally, the blue, gray, and red official timekeeper models adopt the official colors of the Red Bull Air Race. Each model can be selected with a leather strap or metal bracelet, and comes in either a 38mm or 42mm case. Specifications