And now for something different...

Having not passed Rolex's famously strict quality control due to the tinniest of print imperfections, this Sea-Dweller COMEX (tritium) dial was fitted to a regular sapphire glass SD ref. 16600 with full box & papers.

The result makes this professional diver's watch unique, and definitely trumps all other regular SD's out there. With original COMEX dials being extremely rare and valuable, this example is something we're not likely to have again. 

COMEX (Compagnie Maritime d’Expertises) is a French diving company that worked closely with Rolex from 1970 -1997 specifically for saturation diving. What makes them so rare is they were produced in very small numbers, and only issued to COMEX divers, and not sold through Rolex AD's.