AI Appraisal Estimate

This is a rectangular Indonesian postage stamp featuring a depiction of the Istiqlal Mosque in Jakarta. The stamp is predominantly a rich brown color with the mosque illustration and text rendered in white. Its physical characteristics include a standard perforated edge, typical of postage stamps, suggesting it was produced for postal use. The design showcases the iconic architecture of the Istiqlal Mosque, including its large central dome, minaret, and surrounding structure, all rendered with clean, architectural lines. Prominently displayed on the left side of the stamp are the monetary values 'Rp 1.50' and below it '+ 0.50', indicating a face value with an additional surcharge, often used for charitable or special causes. The upper right corner features 'MESJID ISTIQLAL DJAKARTA', identifying the depicted building and its location. Along the right vertical edge, 'REPUBLIK INDONESIA' is printed, clearly indicating the issuing country. The stamp appears to be in unfranked condition, possibly unused, and shows good preservation with sharp details and no visible creasing, tears, or significant discoloration. It is housed in what appears to be a protective clear plastic sleeve or mount, common for philatelic preservation, which itself shows some minor handling evidence with faint parallel lines across its surface. The overall craftsmanship is consistent with national postal service issues.

I have visually examined the provided image of the Indonesia Masjid Istiqlal Djarkarta Postage Stamp (Rp 1.50 + 0.50). Physically, the stamp appears to be in unfranked, excellent condition, exhibiting sharp details, clean perforations, and no visible creasing, tears, or significant discoloration. Its presentation within a clear protective sleeve further suggests careful philatelic preservation. Based on the consistent design elements for Indonesian postal issues of its era, I find its authenticity likely. The '+' notation for value indicates a semi-postal stamp, often issued for charitable causes. However, without physically handling the stamp, I cannot definitively confirm paper type, watermarks, gum condition, or any subtle printing errors that would require magnification or UV light. Similarly, verifying full authenticity and ruling out counterfeits relies on an in-person examination and comparative analysis with known authentic examples. While the Istiqlal Mosque is an iconic landmark, this particular stamp issue is not considered rare. Semi-postal stamps often have slightly higher face values but are not inherently high-value collectibles unless they possess specific varieties or errors. Market comparables for common Indonesian definitive or semi-postal stamps from this period typically show modest values. Demand is primarily from general Indonesian philatelists or thematic collectors interested in architecture or religious buildings. Factors impacting its value negatively are its commonality; positively, its superb apparent condition. For a definitive authentication, I would require a physical inspection to check for pulp composition, precise perforations, and fluorescent properties, and ideally, provenance documentation.