Guess you have asked the impossible. Since Heuer did not publish brochures with these, just their stock watches, it is my opinion that many of the logo watches could be made up and there is very little way to verify them.

The recent controversy over the Champion logo watch is a great example. I would suspect unless we can get the Champion Spark Plug company to verify the Heuer link that it is any one's guess. I do think it is fair to say that there certainly may exist several examples of real logo endorsements.