In some usages the "C" has an open face, and in others it is closed. When asked about this, the Chiefs PR and equipment staff said, "there is no rhyme or reason to it. Wish I had more to tell you, but it definitely is interesting. Never noticed that before!" Unlike several NFL franchises, the Chiefs' uniform design has essentially remained the same throughout the club's history. It consists of a red helmet, and either red or white jerseys with the opposite color numbers and names. White pants were used with both jerseys from 1960–1967 and 1989–1999. After a brief disappearance, the Chiefs re-introduced the all-white uniform combinations for the 2006 season. Although many NFL teams in recent years have worn their dark jerseys with their dark pants, the Chiefs unveiled their all-red combination for their 2013 home opener against the Dallas Cowboys. When the Chiefs wear their red uniforms, they had always worn white pants, until September 15, 2013. The Chiefs have never worn an alternate jersey in a game, although gold jerseys with red numbers trimmed in white, and black jerseys with red numbers trimmed in gold, are sold for retail. The white jersey–red pants combination was not used between 1989 and 1999, primarily during the period when Marty Schottenheimer was the team's head coach. In 2006, under new head coach Herman Edwards, the Chiefs wore white uniforms with white pants at home against the Cincinnati Bengals. Prior to that game, the Chiefs had only worn their white jerseys at home in 1980, which they did for all eight home games that season under Marv Levy. Following Lamar Hunt's death on December 13, 2006, the Chiefs wore the all-white combination for road games against the San Diego Chargers on December 17 and Oakland Raiders on December 23. It is said the all-white combination was a tribute to Hunt, who reportedly favored the all-white uniforms. The team wore the all-white combination in their playoff game versus the Indianapolis Colts. The team did not wear the all-white combination during the 2007 and 2008 seasons. In 2009, the Chiefs wore the all-white Dallas Texans throwback uniform in an AFL Legacy game against the Oakland Raiders November 15. They wore the modern all-white uniform against the Cincinnati Bengals December 27. In 2007, the Kansas City Chiefs honored the late Lamar Hunt and the AFL with a special patch. In 2008, the patch became permanently affixed to the left chest of both Kansas City's home and away jerseys. In select games for the 2009 season, the Chiefs—as well as the other founding teams of the American Football League—wore "throwback" uniforms to celebrate the AFL's 50th anniversary and the 1962 Dallas Texans team that won the AFL Championship.