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<p>[QUOTE=&quot;Any Jewelry, post: 10782789, member: 2844&quot;]&quot;I own a brass astrolabe and would like your informed opinions regarding its authenticity, origin, and dating.</p><p>Material: Brass, with a natural patina and some verdigris marks.</p><p>Composition: A finely engraved main plate (mater), with three interchangeable plates (tympana).</p><p>The reverse is decorated with zodiac symbols, Arabic inscriptions, and astrological grids.</p><p>Each tympana is engraved with celestial grids adapted to different latitudes. Probable origin: Islamic world (Maghreb or Middle East).</p><p>Estimated age: 19th–20th century (uncertain).</p><p><br /></p><p>Do you have a more precise idea of its period and provenance? What might its value be to collectors?</p><p><br /></p><p>Thank you!</p><p>Kind regards&quot;[/QUOTE]</p><p><br /></p>

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