0+ (Unillustrated Parts)  
1+ Seat cushion  
2+ Cushion cover  
3+ Seat squab  
4+ Seat squab cover  
5+ Seat squab armrest  
6+ Headrest  
7+ Headrest escutcheon  
8+ Paint clearing setscrew  
9+ Spring nut  
10+ Paint clearing setscrew  
11+ Plain washer  
12+ Spire nut  

The part numbers in the assembly image below relate to the product number in the table. Clicking on the part number will open up the relevant part details.