AI Appraisal Estimate

This is a rectangular postage stamp issued by the Republic of Austria ('REPUBLIK ÖSTERREICH') in 1961 to commemorate the 75th anniversary of the Sonnblick Observatory ('75 JAHRE SONNBLICK OBSERVATORIUM'). The stamp features a monochromatic design in slate-blue/grey-blue ink on off-white paper with white borders. The central image illustrates the Hoher Sonnblick peak with the observatory perched at the summit, rendered with fine cross-hatching and dot-pattern engraving. The denomination 'S 1.80' (Schilling) is positioned in the top left. Notable markings include the designer/engraver's name 'H. RANZONI D. J.' at the bottom center. The stamp is presented in a vertical orientation with standard perforations. Regarding condition, it appears to be a used specimen as evidenced by a partial black circular date stamp (CDS) or 'Wien' cancellation mark on the lower right corner. The perforations appear relatively intact, though there is a slight crease or surface mark visible near the top left corner within the dark mounting background. The item is set against a dark philatelic mount, which is placed on a light-colored grid paper. The craftsmanship reflects the mid-20th-century Austrian tradition of high-quality recessed printing (engraving).

I have conducted a visual examination of the 1961 Republic of Austria 1.80s '75 Years of Sonnblick Observatory' stamp. This specimen is a prime example of the high-quality recessed printing typical of the Austrian State Printing Works during this era, designed and engraved by Hans Ranzoni the Younger. The stamp is a slate-blue commemorative issue, printed on unwatermarked paper with a perforated gauge of 14x13.75. Condition-wise, this is a 'used' specimen (cancelled-to-order or postally used). It bears a partial circular date stamp (CDS) on the lower right quadrant. The perforations appear largely intact, though I observed a slight surface disturbance or potential crease near the upper left corner. Such minor flaws, while common, significantly affect the grade of an otherwise standard specimen. From a rarity perspective, this is a high-volume issue with millions printed; as such, it remains very common in the philatelic market. Comparing this to current market data (cataloged as Scott #675 or Michel #1087), used examples typically trade at minimum catalog values. There is steady demand for Austrian 'Beautiful Stamps' among thematic collectors of mountains or science, but supply vastly exceeds that demand. Limitations: This appraisal is based solely on digital imagery. A physical inspection is required to check for paper thinning, gum disturbances (if any), or 'repaired' perforations. Scientific verification of the ink and paper under UV light would be necessary to rule out sophisticated reprints, though the low market value makes forgery unlikely. Final value is contingent on these physical factors.