The twenty-four Gs400 1978 (c) (e01 E02 E04 E17 E18 E21 E22 E24 E25 E30 E34 E39) Special Market (e18) (gs400c,ec,n:~f.no.71031) (gs400en:f.no component parts are all listed in this schematic.
The Special Market (e18) (gs400c,ec,n:~f.no.71031) (gs400en:f.no assembly is constructed from several parts from which the Tube,outer,left is the most expensive.