Leilão Bidspirit | An Islamic Brass Astrolabe with

An Islamic Brass Astrolabe with Openwork Rete and Multiple Latitude Plates. A finely engraved Islamic brass astrolabe composed of multiple interchangeable plates (tympans), a rete with intricate cutouts representing fixed stars, and a rotating alidade. The piece is densely inscribed with Arabic numerals, star names, calendrical notations, and Islamic astronomical markers in elegant naskh script. The throne is surmounted by a ring for suspension and engraved with Arabic calligraphy, including the maker's inscription, which reads: “O Opener of the doors, open for us goodness.” The back plate (al-ʿadhud) is filled with concentric scales used for various astronomical calculations, including degrees, zodiac signs, and a calendar with the months inscribed in Arabic. One plate is marked with the city name Isfahan, indicating it may have been calibrated for use in that region. H: Approximately 22.5cm Provenance: Private property of a distinguished NW London collector.