Of all the components used in this assembly the Seat Dual is the most expensive.
With six applications this Screw Cross 6x20 is the most specified part.
Parts such as the Dual Seat (ca160): Bolt Seat Pivot, Seat Dual, Metal R Carrier, Collar Seat are included in the Ca160 Touring 1966 Usa Dual Seat (ca160) parts fiche.