--- title: "Nicaragua Aereo 1981 Postal Union Congress Commemorative Stamp | Curiosa.com" description: "This is a typical commemorative airmail (Aereo) stamp from Nicaragua, issued in 1981, with a denomination of 3.00. The design features a modern building, lik..." lang: en json-ld: | [ { "@context": "https://schema.org", "@type": "Product", "name": "Nicaragua Aereo 1981 Postal Union Congress Commemorative Stamp", "description": "This is a typical commemorative airmail (Aereo) stamp from Nicaragua, issued in 1981, with a denomination of 3.00. The design features a modern building, likely a convention center, and a classical statue, commemorating the 'Congreso de la Unión Postal de las Américas y España' (Postal Union of the Americas and Spain) held in Managua, Nicaragua, an important event in postal history.", "image": [ "https://smpgbcsonkmwzognzosu.supabase.co/storage/v1/object/public/curiosity-images/23f765b9-903f-4e12-a37d-2d9e1330cd48/1-1769002198094.jpg", "https://smpgbcsonkmwzognzosu.supabase.co/storage/v1/object/public/curiosity-images/23f765b9-903f-4e12-a37d-2d9e1330cd48/2-1769002198095.jpg", "https://smpgbcsonkmwzognzosu.supabase.co/storage/v1/object/public/curiosity-images/23f765b9-903f-4e12-a37d-2d9e1330cd48/3-1769002198095.jpg" ], "category": "stamps", "offers": { "@type": "Offer", "priceCurrency": "USD", "availability": "https://schema.org/InStock", "price": "0", "priceValidUntil": "2027-08-26", "itemCondition": "https://schema.org/UsedCondition" }, "brand": { "@type": "Person", "name": "cajavanderwoude" } }, { "@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": 1, "name": "Home", "item": "https://curiosa.com/" }, { "@type": "ListItem", "position": 2, "name": "Archive", "item": "https://curiosa.com/archive" }, { "@type": "ListItem", "position": 3, "name": "Stamps", "item": "https://curiosa.com/archive/stamps" }, { "@type": "ListItem", "position": 4, "name": "Nicaragua Aereo 1981 Postal Union Congress Commemorative Stamp" } ] } ] --- [Skip to main content](#main-content) Open menu [Curiosa ](/) [Home](/) [How it works](/how-it-works)[Leaderboard](/leaderboard)[Museum](/museum)[Pricing](/pricing) Art [Paintings](/archive/paintings)[Prints & posters](/archive/prints)[Photography](/archive/photography)[Asian art](/archive/asian)[Tribal & ethnographic](/archive/tribal)[Browse all categories](/archive) Design [Interior](/archive/interior)[Decorative objects](/archive/decorative)[Ceramics & pottery](/archive/ceramics)[Mechanical & industrial](/archive/mechanical)[Maps & globes](/archive/maps)[Musical instruments](/archive/music)[Browse all categories](/archive) Jewelry & watches [Jewelry](/archive/jewelry)[Watches](/archive/watches)[Gemstones](/archive/gemstones)[Browse all categories](/archive) Collectibles [Trading cards](/archive/trading-cards)[Memorabilia](/archive/memorabilia)[Rare coins & currency](/archive/coins)[Stamps](/archive/stamps)[Comic books & graphic novels](/archive/comics)[Vinyl records](/archive/vinyl)[Browse all categories](/archive) Antiques & curiosities [Antiques](/archive/antiques)[Historical relics](/archive/relics)[Fossils](/archive/fossils)[Science & curiosities](/archive/science)[Folklore & occult](/archive/folklore)[Militaria](/archive/militaria)[Religious & devotional](/archive/religious)[Browse all categories](/archive) [Sign In](/auth)[Try a scan](/scan) # Nicaragua Aereo 1981 Postal Union Congress Commemorative Stamp ![Nicaragua Aereo 1981 3.00 Postal Union Congress commemorative stamp featuring a building and statue. - view 1](https://smpgbcsonkmwzognzosu.supabase.co/storage/v1/object/public/curiosity-images/23f765b9-903f-4e12-a37d-2d9e1330cd48/1-1769002198094.jpg) 1/3 ![Nicaragua Aereo 1981 Postal Union Congress Commemorative Stamp - view 1](https://smpgbcsonkmwzognzosu.supabase.co/storage/v1/object/public/curiosity-images/23f765b9-903f-4e12-a37d-2d9e1330cd48/1-1769002198094.jpg?width=200&quality=75) ![Nicaragua Aereo 1981 Postal Union Congress Commemorative Stamp - view 2](https://smpgbcsonkmwzognzosu.supabase.co/storage/v1/object/public/curiosity-images/23f765b9-903f-4e12-a37d-2d9e1330cd48/2-1769002198095.jpg?width=200&quality=75) ![Nicaragua Aereo 1981 Postal Union Congress Commemorative Stamp - view 3](https://smpgbcsonkmwzognzosu.supabase.co/storage/v1/object/public/curiosity-images/23f765b9-903f-4e12-a37d-2d9e1330cd48/3-1769002198095.jpg?width=200&quality=75) Estimated value Up to $5 Rarity Ordinary(3/10) Category [Stamps](/archive/stamps) Era 1980s Origin 🇳🇮 Nicaragua Authenticity Very High (85%) 81 ## NICARAGUA AEREO 1981 POSTAL UNION CONGRESS COMMEMORATIVE STAMP: IDENTIFICATION This is a typical commemorative airmail (Aereo) stamp from Nicaragua, issued in 1981, with a denomination of 3.00. The design features a modern building, likely a convention center, and a classical statue, commemorating the 'Congreso de la Unión Postal de las Américas y España' (Postal Union of the Americas and Spain) held in Managua, Nicaragua, an important event in postal history. Compare with other stamps in the archive: [10-Cent Pan-American Union Air Mail Stamp (Scott #C25)](https://curiosa.com/archive/stamps/10-cent-pan-american-union-air-mail-stamp-scott-c25), [1943 Amarillo, Texas Censored Military Cover](https://curiosa.com/archive/stamps/1943-amarillo-texas-censored-military-cover), [Belgian Congo, Queen Elisabeth Mask Issue (1928-1930) - 6 Francs](https://curiosa.com/archive/stamps/belgian-congo-nsumbu-mask-postage-stamp). ## POSTAL HERITAGE The stamp commemorates the 13th Congress of the Postal Union of the Americas and Spain (UPAEP), an intergovernmental organization fostering cooperation among postal services in Latin America, Spain, and Portugal. The UPAEP, established in 1911, plays a significant role in standardizing postal ... The stamp commemorates the 13th Congress of the Postal Union of the Americas and Spain (UPAEP), an intergovernmental organization fostering cooperation among postal services in Latin America, Spain, and Portugal. The UPAEP, established in 1911, plays a significant role in standardizing postal services and fostering philatelic exchange within its member countries. This issue specifically highlights Nicaragua's hosting of the event in 1981, marking a moment of regional diplomatic and logistical coordination in the postal sector. Read full story ## SCARCITY Ordinary 40-55% Common Legendary Standard antiques commonly found at estate sales and flea markets. Plentiful supply meets modest demand. Rarity 3/10. Curiosa currently catalogues 16 stamps items at rarity 3 or higher. ### Typical Characteristics - Moderate production runs - Common at estate sales - Entry-level collectibles ### AUTHENTICITY CONFIDENCE Very High (85% confidence) #### Confidence Factors - This is a relatively common and low-value issue, making sophisticated forgery uneconomical. - The printing quality appears consistent with known genuine examples of this era and country. - No obvious signs of reperforation, regumming, or color alteration are visible. [How does authenticity detection work?](/fake-art-detection) ## PHILATELIST'S VERDICT Philatelist Stamp Specialist The stamp is clearly identifiable by its country, year, denomination, and commemorative event, all visible in the images. The condition appears sound, suggesting a straightforward identification. ### KEY EVIDENCE - 1 The inscription 'NICARAGUA Aereo 1981' clearly identifies the country, type, and year of issue. - 2 The denomination '₡ 3.00' is clearly printed. - 3 The text 'Congreso de la Unión Postal de las Américas y España MANAGUA: NICARAGUA 1981' confirms its commemorative purpose. - 4 The visible perforations and lack of cancellation indicate an unused stamp. - 5 The design of a modern building and statue is typical for an official commemorative issue. ### UNCERTAINTIES - • Assessing the gum condition (hinged vs. never hinged) requires physical inspection. - • Exact centering, while appearing good, would need to be measured against a gauge for precise grading. ### WHAT WOULD IMPROVE CERTAINTY - → Examine the reverse side for gum condition (Original Gum, Never Hinged, lightly hinged, no gum, regummed). - → Measure the perforation gauge to confirm standard issue specifications. - → Check for watermarks using a watermark tray, as this can be a key identifier for some Nicaraguan issues. - → Consult a relevant stamp catalog (e.g., Scott Standard Postage Stamp Catalogue) for the definitive catalog number, specific color varieties, and known errors. - → Use a magnifiying glass to inspect for printing flaws. COLLECTOR GLOSSARY (5 terms) ## CONDITION & GRADE ### Condition The stamp appears to be in very good condition with no visible creases, tears, or significant discoloration. Centering seems acceptable, though a more precise measurement would be needed. The lack of a cancellation mark suggests it is unused. ## PHILATELIC VALUATION Up to $5 Updated: Feb 26, 2026 How we estimate value - Market comparables from auctions & retail - Condition, completeness & craftsmanship - Current collector demand & trends - Low = quick sale, high = patient seller For informational purposes only, not a formal appraisal. ## FROM THE CABINET OF [CA ](/cabinet/cajavanderwoude) [ ### cajavanderwoude ](/cabinet/cajavanderwoude) Wonderseeker • 5 items [View Full Cabinet](/cabinet/cajavanderwoude) ### COMMENTS No comments yet. Be the first to share your thoughts! Sign in to leave a comment [Sign In](/auth) ## SIMILAR CURIOSITIES [ ![China Pudong Development Set of 6 (Scott #2714-2719) 1996](https://smpgbcsonkmwzognzosu.supabase.co/storage/v1/object/public/curiosity-images/23f765b9-903f-4e12-a37d-2d9e1330cd48/1-1769002773595.jpg) 3 ### China Pudong Development Set of 6 (Scott #2714-2719) 1996 ](/archive/stamps/chinese-deep-draft-channel-stamps-1998)[ ![Belgian Postal Collection (1918-1933 Issues)](https://smpgbcsonkmwzognzosu.supabase.co/storage/v1/object/public/curiosity-images/a7a90c81-5b59-4352-b8b1-e0d4b468974e/1-1778404802694.jpg) 6 ### Belgian Postal Collection (1918-1933 Issues) ](/archive/stamps/collection-of-belgian-philatelic-issues-19181933)[ ![Belgian Congo, Queen Elisabeth Mask Issue (1928-1930) - 6 Francs](https://smpgbcsonkmwzognzosu.supabase.co/storage/v1/object/public/curiosity-images/33a2322f-fdf0-4ee6-9946-f8be70ecf365/1-1771865183885.jpg) 4 ### Belgian Congo, Queen Elisabeth Mask Issue (1928-1930) - 6 Francs ](/archive/stamps/belgian-congo-nsumbu-mask-postage-stamp)[ ![New Zealand 1967 Health Stamp - Rugby Player with Boy](https://smpgbcsonkmwzognzosu.supabase.co/storage/v1/object/public/curiosity-images/116cd513-04eb-46c6-a70a-7508f546f1e0/1-1768328948314.jpg) 4 ### New Zealand 1967 Health Stamp - Rugby Player with Boy ](/archive/stamps/new-zealand-1967-health-and-postage-rugby-stamp)[ ![Bosnia and Herzegovina 1906 1-Heller Town View Stamp with German Overprint](https://smpgbcsonkmwzognzosu.supabase.co/storage/v1/object/public/curiosity-images/33a2322f-fdf0-4ee6-9946-f8be70ecf365/1-1771865548558.jpg) 4 ### Bosnia and Herzegovina 1906 1-Heller Town View Stamp with German Overprint ](/archive/stamps/bosnia-and-herzegovina-1-heller-postage-stamp)[ ![Belgium 1912 definitive series postage stamp, 10-centime carmine on blue frame, cancelled 'MONS S-GENERAL'](https://smpgbcsonkmwzognzosu.supabase.co/storage/v1/object/public/curiosity-images/33a2322f-fdf0-4ee6-9946-f8be70ecf365/1-1771864882795.jpg) 4 ### Belgium 1912 definitive series postage stamp, 10-centime carmine on blue frame, cancelled 'MONS S-GENERAL' ](/archive/stamps/belgian-revenue-stamp-timbre-fiscal-with-mons-general-cancellation) [View all stamps](/archive/stamps) ### ABOUT STAMPS Rare stamps, postal history, first day covers, and philatelic treasures. [Stamps value and rarity guide](/archive/stamps) ## SHARE THIS CURIOSITY XWhatsAppEmailPinterestTelegramDiscordSignalCopy Link Have your own curiosities to discover? [Scan Your Curiosity](/scan) 1. [Home ](/) 2. [Archive](/archive) 3. [Stamps](/archive/stamps) 4. Nicaragua Aereo 1981 Postal Union Congress Commemorative Stamp [ C CURIOSA ](/) Uncover value, meaning, and story. [X](https://x.com/Curiosa_app)[Instagram](https://instagram.com/curiosa.app)[TikTok](https://www.tiktok.com/@curiosa.app) Explore - [How it works](/how-it-works) - [Scan Tips](/scan-tips) - [Archive Gallery](/archive) - [Brands](/brands) - [Artists](/artists) - [Museum](/museum) - [Leaderboard](/leaderboard) - [Rarity Score](/rarity) - [Collector Tiers](/collector-tiers) Use Cases - [Fake Art Detection](/fake-art-detection) - [Provenance Gap Detection](/provenance-gap-detection) - [Period Plausibility Analysis](/period-plausibility-analysis) - [Insurance Readiness](/insurance-readiness) - [Inheritance Evaluation](/inheritance-appraisals) - [City Curiosity Guide](/city-curiosity-guide) - [Art & Collectible Appraisal](/art-appraisal) - [Is It Real?](/is-it-real) - [Install App](/app) Company & Support - [About](/about) - [Pricing](/pricing) - [FAQ](/faq) - [Contact](/contact) - [Feature Request](/feature-request) - [Bug Report](/bug-report) Legal - [Our Privacy Promise](/privacy-promise) - [Privacy Policy](/privacy) - [Terms of Service](/terms) - [Disclaimer](/disclaimer) - [Return policy](/return-policy) Join the Cabinet Get weekly curiosities, collecting tips, and exclusive finds. Subscribe EU Data Protection • GDPR Compliant • No Third-Party Sharing © 2026 Curiosa. All rights reserved.