The Washer,6.5x20x1.6,bla is the cheapest item from this partsfiche.
The Side Covers/chain Cover is made up of components including this Cover-side,lh,ebony/s which is the most expensive.
Some items from this specific schematic: Cover-side,lh,ebony/s, Bolt,socket,6mm, Case-chain, Bolt-flanged,6x14,bla.