WOW, nice going. I used to have a 18K AU Rolex, too. Mine was the GMT Master, the pilot's watch. Bought it in Hong Kong in 1970 for, I think, $600 or so. (Won the money playing poker).
Anyway, this guy was lost circa, 1980 or so. Worth roughly, 10K today. Anybody that finds it can keep it, though.
It was lost running a bluff against 7 nothing with me holding AK in a game of low-ball. That sucker may have made it to Henderson or LV by now. It has my name on the back.
Let me know if anybody 'er finds it, ok? (it was a bit heavy anyway).