Parts such as the Frame - Seat (rm50n, Rm50t, Rm50x): Tool Set, Seat Assembly, Seat Assembly, Frame are included in the Rm50 1978 (c) Frame - Seat (rm50n, Rm50t, Rm50x) parts fiche.
This Seat Assembly is the most expensive of the items that make up this Frame - Seat (rm50n, Rm50t, Rm50x) assembly.
