Issued in 1971 to mark the 300th anniversary of the Jamaican Post Office (1671–1971), this commemorative 10c stamp presents a fascinating design: it reproduces the 1970 10c definitive featuring an athlete at the National Stadium, complete with a printed Barneyside, Jamaica circular date-cancel (15 JUN 1971). The layout celebrates advancements in postal marking methods by showcasing a “modern date-cancellation” on an inset stamp image. The deep green frame and the clean typographic presentation make this a visually striking and historically rich piece for collectors interested in postal history, cancellations, and Jamaican commemoratives. A notable thematic crossover between sport, postal technology, and national heritage.