Check (pattern) a board used for playing checkers and chess, and in heraldry. The check pattern has a number of symbolic meanings. In auto racing, the chequered flag is displayed at the finishing line to signal that the race has finished. It originates from the "checkers" who watched the finishing line and checked when cars had finished the race. They began using chequered flags to identify themselves. In some countries, the check pattern has become a symbol of the police. Known as "Sillitoe Tartan", it was first used in Glasgow in the 1930s and was inspired by a pattern worn by some
City of Glasgow Police in 1878, a horse drawn van was introduced for conveying prisoners. Due to the City of Glasgow Act 1891, the City boundaries were extended to the south, north and west sides of the City. Due to the extension, a system of 14 cast iron Police Signal boxes was installed in the outlying areas. By 1900, the City of Glasgow Police numbered 1355 officers and men. In 1904 the force appointed its first Chief Inspector of Detectives, and the first Detective Constables were appointed. The Old Central Police Office in South Albion Street closed and a new Central Police Office in