This is a Belgian railway parcel post stamp issued in 1879, denominated 10 centimes in red. It features the Belgian coat of arms with crowned lion rampant at the center, flanked by decorative wheels symbolizing the railways. The inscription “CHEMINS DE FER” (Railways) appears at the top, while “BELGIQUE” and “DIX CENTIMES” mark the country and denomination. These stamps were used for railway parcel services rather than regular mail, making them highly collectible. The example shown is postmarked, adding historical postal value.