1968 Triennale Art Exhibition is a special Indian stamp issued on March 31, 1968 to mark the First Triennale – an event of major significance to artists in India and aboard. The first exhibition was inaugurated at New Delhi on the 10th February, 1968. One of the finest examples of the 1968 first Triennal exhibition with orange omitted error was offered for $10,000 by Robert.A.Siegel on November 15, 2017. This is one of the most desirable modern philatelic errors of India that consists on the absence of orange color on the stamp. Only 14 examples of this philatelic item have been recorded.