The rainbow watch first surfaced in 2012 when Rolex set multi-colored sapphires into a limited-run Cosmograph Daytona. It has been around sporadically since then, but has rebounded as a full-fledged genre in the past few years.
The protocol for rainbow watches is to set gemstones into the bezel in a gradient colors that run from light to dark, with each color blending into the next one on the palette. The composition takes a lot of color matching and some precision, custom cutting.
Shown below are some beautiful examples of these unusual watches.

Mark Sirianni
25 Fraley St.
Kane, PA. 16735
[email protected]
1-814-558-4818 Cell
1-814-837-9435