Thanks to all for a very interesting discussion. According to the order sheet I got with my 69, it too came with wire wheel discs. Its got Rallye II wheels on it now. Maybe I should keep an eye out for a set of wire wheel discs. The car has disc brakes so I imagine it would have had 15" wheels or some special disc brake 14" wheels when new. In the source quoted was there any indication of how many 69's came with the wire wheel caps.