 Hunt's inspiration for the interlocking "KC" design was the "SF" inside of an oval on the San Francisco 49ers helmets.Unlike the 49ers' logo, Kansas City's overlapping initials appear inside a white arrowhead instead of an oval and are surrounded by a thin black outline.From 1960 to 1973, the Chiefs had grey facemask bars on their helmets, but changed to white facemasks in 1974, making them one of the first teams (alongside the San Diego Chargers, who introduced a yellow facemask that same year) in the NFL to use a non-gray facemask.