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 Scotland The River Clyde Police were established in 1858 and were responsible for policing the Clyde up to the Tail of the Bank. They were merged into the Marine Police division of the City of Glasgow Police in 1866, and wore a small anchor on their collar. The cost of the division was borne by the Clyde Navigation Trust. City of Glasgow Police The City of Glasgow Police or Glasgow City Police was the police of the City of Glasgow, Scotland. In the 17th century, Scottish cities used to hire watchmen to guard the streets at night, augmenting a force