A long time back I remember seeing an advert and discussion about a very expensive unique men's wristwatch [only a few were constructed (they were handmade)]. The case was round and about 3/8 inch to 1/2 inch deep; the interior was dish-shaped and basically of all gold construction. It 's unique quality was the crystal lifted and a dish-shaped subsurface reflected a 3-dimensional image on the crystal; the image was of whatever small object was placed on the dish beneath the crystal. Any thoughts on this would be appreciated.