Just back from a full service at Rolex UK and under their official warranty for the next two years, this is the elusive Sea-Dweller 4000 that was only in production for 3 years (2014 - 2017). 

With just a handful for sale in the UK, this black ceramic bezel Sea-Dweller ref. 116600 with Helium escape valve was the last off the classic 40mm SD's; exclusively in steel and with the flat no cyclops sapphire glass, which purists love. 

Rolex self-winding calibre 3135, waterproof to an impressive 4000ft and fitted to the sporty Oyster bracelet. Presented with its Rolex pouch and Rolex service NFC card.