The lowest price component in this Gasket Kit A parts-list fiche is the O-ring..
The Gasket Kit A assembly is constructed from several parts from which the Gasket Kit A is the most expensive.
Parts such as the Gasket Kit A: O-ring.13.8x1.9, Gasket,cylinder H, Washer C,sealing, O-ring,30mm are included in the Ch125 Spacy 1986 (g) Switzerland Gasket Kit A parts fiche.