Quadrant Or 2411/2

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Quadrant (رُبْع), comprising an astrolabe quadrant (ربع المُقَنْطَرَات, Side A) and a (ربع المُجَيَّب). The quadrant is signed by its maker, Aḥmad ibn Ibrāhīm al-Sharbatlī (أحمد ابن إبراهيم الشربتلي, Side A), and dated 1256 CE (Side B). This instrument is inscribed in Arabic and is made of lacquered wood.

Record on Qatar Digital Library (QDL): https://www.qdl.qa/en/archive/81055/vdc_100066404465.0x000001