The Studio Anne Carlton (SAC) Isle of Lewis Chess Set with a Walnut and Sycamore Chessboard. The original chess pieces were discovered about 1830 on the Isle of Lewis off the Coast of Scotland. They are now housed in Museums in London and Edinburgh and are dated to the 12th century. Many pieces of varied designs were discovered. The SAC interpretation closely follows the original pieces. SAC is one of the leading brands of resin chess sets in the world. You will find it hard to match the quality with cheaper brands. The 50cm walnut and sycamore folding chessboard has 5cm playing squares and a felted base.