This 2.50 Franc stamp from Luxembourg was issued in 1949 to commemorate the 75th Anniversary of the Universal Postal Union (UPU), established in 1874. Designed by R. Weimerskirch and printed by Courvoisier S.A., it features a bold image of a postal cancel mark over a world map, symbolizing global communication and cooperation through mail. The stamp’s modernist design and vibrant rose-red background emphasize the spirit of international unity and postal progress. It remains a sought-after issue among collectors of UPU and postal history themes.