Parts such as the Rear Wheel: Joint A,brake Arm, Indicator,rr.brk, Spring,brake Shoe, Shoe,set.brake (nas) are included in the Sb50 Es Elite E 1988 (j) Usa Rear Wheel parts fiche.
In this schematic the "Shoe,set.brake (nas)" is used most often.
This schematic depicts all components used in the Sb50 Es Elite E 1988 (j) Usa Rear Wheel partslist.