This 
tympan is
      inverted with respect to the others. It is most likely a
      later addition and is written in a different script..
      
      
        Almucantars
        
          
          
            | Divisions | Labelled | Style | 
          
            | Divided every 6° from 0° to 90° | Labelled every 6° with   (Abdjad)
            numerals | Plain line. | 
        
       
      
      
        Circles
        
          
            | Type | Labelled | Style | Notes | 
          
            | Equator |  | Plain line. |  | 
          
            | Tropic of Cancer |  | Plain line. |  | 
          
            | Tropic of Capricorn |  | Plain line. |  | 
        
       
      
        Lines
        
          
            | Type | Labelled | Description | 
          
            | Meridian line |  |  | 
          
            | Horizon rectus |  |  | 
          
            | Unequal hours | Numbered (Numbers in Numbers, engraved script) | (Abdjad), Plain line style. | 
        
       
      
      
        Inscriptions
        
          
            | Transcription | Translation | Type | 
          
            | عرض ما | Latitude 41 | Latitude | 
          
            | ساعاته يه | Hours 15h | Hours of daylight | 
          
            | المشرق | East | Direction | 
          
            | المغرب | West | Direction |