3-7-77 was the infamous symbol of the Vigilance Committee in Montana uring the Old West. People who had the mysterious set of numbers '3-7-77' painted on their tent or cabin knew that they had better leave the area or be on the receiving end of vigilante justice. To this day the numbers appear on the shoulder patch of the Montana Highway Patrol, who say they do not know the original meaning of the symbol. It also appears on the flight suits of pilots of the Montana Air National Guard. Various theories have been put forth about its origin, among them: