Issued in 1973, this Belgian stamp commemorates the 60th anniversary (1913–1973) of the International Workers' Sports Movement. The dynamic design features two athletes in white sporting attire, energetically raising a large red banner and a palm branch, symbolizing solidarity, peace, and workers’ unity. The backdrop includes architectural landmarks, reinforcing the movement’s global scope. The vivid colors and strong imagery celebrate physical culture as a means of empowering the working class. Denominated at 4.50 francs, this issue holds significance for collectors interested in labor history and sports philately.