Pittsburgh Police hats with checkered bands, which are dark navy blue and gold in color, popularly known as the "Sillitoe Tartan" and named after its originator, Percy J. Sillitoe, Chief Constable of Glasgow, Scotland, in the 1930s. While the checkered band is a common police symbol in the United Kingdom, Australia and some European countries, the Chicago Police Department, Cook County Sheriff's Police, the Allegheny County Sheriff's Office, and the Pittsburgh Bureau of Police are the only police forces in the United States that have adopted it as part of their uniforms. As recently as July 1930, police were required to wear
Association of Chief Police Officers in Scotland the Chief Constables' (Scotland) Club (a predecessor of ACPOS). At the time, many police forces around Scotland were amalgamating, and more were expected to in the future. A standard design of cap badge could be adopted by forces around Scotland, so new badges would not need to be purchased when two forces merged. Each force then generally had its own distinctive cap badge, usually featuring the coat of arms of the City, Burgh or County which it covered. The design comprises a Scottish thistle in a wreath of thistle leaves, all on a scroll tablet with the Latin motto: "Semper