S330 – Spain 1930 – Pro Unión Iberoamericana. Colombian Pavilion — additional vertical perforation row; 10 céntimos, dark green. Edifil 569. Issued 10 October 1930.
Production: Photogravure (huecograbado). Perforated issue; precise gauge not individually established except the compared vertical rows on S330.
Condition: Mint Never Hinged (MNH). Original gum without hinge traces. A second vertical line of perforation holes, measured by collector as gauge 14 like the normal row, passes through the printed design. POSSIBLE DOUBLE PERFORATION (posible doble dentado), not authenticated as a production error; no rarity premium applied. Preserve as a research specimen. Important research specimen: possible double perforation, subject to expert authentication; collector confirms the extra row has the same gauge as the standard perforation. No confirmed catalogue variety or sale premium.
Catalogue reference: Edifil (owner’s catalogue, p. 32): €1.20 MNH; €0.50 MH. AllCollect appraisal: €0.30. Collection Grade: 3/5; Investment Grade: 2/5. Decision: KEEP / RESEARCH.
