Spanish Postage Stamp - 1963 Jusepe de Ribera Series (St. Christopher)

This is a single postage stamp from Spain featuring an engraving of 'San Cristóbal' (Saint Christopher) originally painted by the Spanish Baroque artist Jusepe de Ribera. The stamp has a face value of 80 céntimos (indicated as '80 CTS') and is primarily rendered in a monochromatic slate-blue or teal-green ink within the central image, framed by a beige or ochre border. The typography at the bottom clearly reads 'CORREOS ESPAÑA'. Beneath the main frame, the text identifies the artwork and the printer, 'F.N.M.T.' (Fábrica Nacional de Moneda y Timbre). From a physical standpoint, the stamp features standard comb perforations on all four sides. Notable condition issues are visible: there is significant dark staining or toning on the left edge and lower-left corner, likely from previous mounting or environmental exposure, and what appears to be a heavy cancellation mark or ink smudge across the face of the saint. Despite these flaws, the intricate engraving detail remains visible, showcasing the high-quality craftsmanship characteristic of 1960s Spanish philatelic production. The paper appears slightly aged, and the centering is reasonably balanced within the perforated frame.