Envelope with special cancellation dedicated to 1961 World Championship Match

An envelope dedicated to the 1961 World Championship Match features a special cancellation. The postage stamp also bears a chess-themed design, paying homage to the great Russian master Mikhail Chigorin.The 1961 World Championship was a rematch between Mikhail Botvinnik and Mikhail Tal. Tal had dethroned Botvinnik the previous year. According to the rules at the time, the world champion who lost their title was entitled to a rematch the following year. The match consisted of 24 games, and Botvinnik emerged victorious with a convincing score of 13–8, thus regaining the world championship title.