Cod.: yellow paper, III+158+III^a ff. (foliation in black Hindu-Arabic numerals, centered above the text on recto pages, up to f. 153r; this foliation is continued at the top left of recto pages in Hindu-Arabic numerals in pencil, while the earlier foliation starts anew with ‘1’ on f. 153v; additional foliation in Arabic-European numerals in pencil at the top left of scattered recto pages, running parallel to the main foliation; catchwords in black or red). A single neat, formal, and fully dotted nastaʿlīq hand in black; no shaddas, substantial hamzas except on initial alifs, no vowels; the size of the hand and boldness of the stroke varies along the text. Book and chapter headings in the same main hand and size in red; chapter headings introduced by abjad numerals in bold black overlined in red; sections indicated with red overlines and sometimes introduced by formulaic qāla or aqūlu in red or in black overwritten in red. Undotted abjad numerals mostly in black and less often in red; Hindu-Arabic numerals in red. Substantial diagrams with lines mostly in red and geometrical points in black, although there are few diagrams in black with points in red; diagram labels in black and red; some unfinished diagrams (23v–24r) and few spaces for diagrams left blank (particularly on ff. 13r–29r); some diagrams in the margins and some pasted diagrams (e.g., on ff. 14r, 14v, 16r, 16v, 22v, 41r, 122v, and 124r). Substantial tables with lines in red, headings in red and black, and abjad notation in red and black; one table left blank (17v). No moisture stains; worm-eaten; major inkblots (20r, 119r); few smudges. Dimensions: 30×17½ cm, written area: 19×10 cm; 23 lines per page. Rebound; purple cloth cover on pasteboard; wooden-like marbled pasteboard on top of the cloth cover except spine and corners. Type III binding.

Cont.: astronomy. — Index: two astronomical diagrams, one pasted, with Persian text and a reference to al-Birjandī (IIIr); Ptolemaica (1v–152r); Ptolemaica (153v–156r); Ptolemaica (156r–158r). Blank: I, IIv, IIIv–1r, 152v–153r, 158v–III^av.

Bibl.: Wilhelm Ahlwardt, Verzeichniss der arabischen Handschriften der Königlichen Bibliothek zu Berlin, vol. V, Berlin: Asher, 1893, pp. 143–144 (no. 5655) and p. 161 (no. 5680); Paul Kunitzsch, Claudius Ptolemäus. Der Sternkatalog des Almagest. Die arabisch-mittelalterliche Tradition, 3 vols, Wiesbaden: Harrassowitz, 1986–1991, vol. III, pp. 9–10; Mª José Parra, ‘A List of Arabic Manuscripts of Naṣīr al-Dīn al-Ṭūsī’s Taḥrīr al-Majisṭī’, Suhayl 16–17 (2018–2019), pp. 251–322, here pp. 259–260 (no. 15). Qalamos: https://www.qalamos.net/receive/DE1Book_manuscript_00014160.