The most reasonably priced component used on the Cs3c 1971 Usa Rear Arm & Chain Case is the Washer(6a1).
The Rear Arm & Chain Case is made up of components including this Rear Arm which is the most expensive.
Parts such as the Rear Arm & Chain Case: Spacer, Case, Chain, Washer(6a1), Screw Pan Head are included in the Cs3c 1971 Usa Rear Arm & Chain Case parts fiche.