Issued in 1953 for Día del Sello Colonial, this Spanish Sahara 10.5 céntimos stamp features two stylized fish swimming among aquatic reeds, printed in rich monochrome green by F.N.M.T. (Madrid). Your example shows a major surface abrasion / ink lift affecting the right fish, creating a striking ghosted appearance—a collectible printing defect variety valued by specialists. The clean left portion highlights the original fine dot-screen engraving, typical of early 1950s Spanish colonial issues. A noteworthy item for thematic collectors of marine life, Spanish territories, or philatelic errors.