0+ (Unillustrated Parts)  
1+ Cushion cover  
2+ Cushion pad  
3+ Squab cover  
4+ Squab pad  
5+ Squab backcover  
6+ Mechanism cover  
7+ Mechanism cover  
8+ Knob  
9+ Escutcheon  

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.