Responses below, in bold --

At the risk of appearing 'off the planet' I am seeking some opinions please, positive, negative or critical. So here goes.......

Does anyone know. Are there any gold plated dash Clocks and Timers out there, either original or after-market? Maybe presentation/celebrity items?

I have never seen any gold or gold-plated dashboard timepieces.

Would there be any demand from high end car owners, either singly or as pairs/ triples/ quads, possibly with backplates mounted on a polished hardwood 'toblerone'?

I doubt that they will want these for their cars; might be an interesting item for the desk or bookcase; but I think the wealthy folks would prefer to have the vintage pieces, rather than any sort of reproduction or re-cased vintage pieces.

If such a product was available, which Heuer models and values might they attract?

It's hard for me to imagine any real market for this. Most people are not looking for gold or gold-plated, in the world of chronographs or racing timepieces.

I have been asked to make this enquiry on behalf of a Master Watchmaker.

Thank you for your advice.

David