S367 – III Pan-American Postal Union Congress airmail, Palacio de Comunicaciones and Cibeles. Spain 1931, III Congreso Unión Postal Panamericana – Correo Aéreo. Edifil 617; 50 céntimos, Dark blue.
Technical: Recess printing (calcografía); perforation 12 line, catalogue specification.
Condition: MNH. Collector confirmed Mint Never Hinged, no bend or crease. Clear engraving of Palacio de Comunicaciones and Cibeles Fountain, excellent centring, largely complete perforations, original gum with mild uniform age toning.
Catalogue: Edifil MNH €0.35; MH €0.25; Used €0.25. AllCollect valuation: €0.35; Collection Grade 4.5/5; Investment Grade 1/5; Decision KEEP.
