MAHJ1956 This set of tiles is based on a set of Mah Jong that was purchased in Hong Kong in 1956. The circles and bamboos are unnumbered. As with many Mah Jong sets, distinguishing FLOWER tiles from SEASON tiles can be difficult. Identification of the two sets is made by the color of the numerals on the tiles. It is customary for one set to have red numerals and for the other set to have blue, green or black numerals. Alternatively one set is sometimes marked N.S.E.W. to distinguish it from the other set.