Denomination: 15 + 5 céntimos
Issue: Día del Sello Colonial (Colonial Stamp Day)
Date: 1955
Design: Features the head of an oryx (gemsbok), a desert antelope native to the Sahara, symbolizing the wildlife of Spanish Sahara. The additional “+5” céntimos surcharge went towards colonial development funds.
Notes: Issued under Spanish administration of Western Sahara, this semi-postal stamp reflects Spain’s policy of highlighting regional identity through natural motifs. It remains a notable item for collectors of colonial-era Spanish territories.