A classic early-independence definitive of Poland, issued shortly after World War I during the formation of the Second Polish Republic. The design features the historic Polish White Eagle within an ornate heraldic frame, printed in a vivid red typographic impression. This 15-fen denomination is part of the first unified Polish postal issues following the end of partition rule. Collectors value this issue for its symbolic national imagery, crisp line-engraving style, and numerous printing varieties found across the series. A key piece for anyone building an early Poland or heraldic-thematic collection.