Design a premium 4:5 collectible postal-stamp poster for [CITY]. Entire composition is o…

Design a premium 4:5 collectible postal-stamp poster for [CITY]. Entire composition is one giant oversized vintage stamp. Engraving-style city landmark in intaglio/etching technique with hatching lines, limited color palette (aged sepia, navy, gold, or deep red). Serrated/perforated edge border. Top arch: country/city name in vintage serif capitals. Center: detailed landmark engraving. Bottom: denomination (e.g., "50¢") in stamp typography, city name. Side margins: "AIR MAIL", issue year, series label. Aesthetic: official vintage postage stamp elevated to fine art print — museum-quality, collectible, nostalgic, premium.