Title: Astrolabe of ‘Umar ibn Yusuf ibn ‘Umar ibn ‘Ali ibn Rasul al-Muzaffari
Creator: ‘Umar ibn Yusuf ibn ‘Umar ibn ‘Ali ibn Rasul al-Muzaffari
Date Created: dated A.H. 690/ A.D. 1291
Physical Dimensions: Case (a): Max. W. 7 5/8 in. (19.4 cm)
Diam. 6 1/8 in. (15.6 cm)
D. 1/4 in. (0.6 cm)
Bar with attached nail (b): Max. H. 1 7/8 in. (4.8 cm)
Max. W. 1 1/8 in. (2.9 cm)
L. 5 in. (12.7 cm)
Net (c): Diam. 5 in. (12.7 cm)
Plates (d-g): Diam. 5 in. (12.7 cm)
Pin (h): L. 1 3/4 in. (4.4 cm)
W. 1/2 in. (1.3 cm)