Rolex reference 16660 was firstly introduced in 1978 and remained in production for only a decade, being discontinued in 1988. Sought-after by collectors and aficionados worldwide, the model is considered to be a transitional link between “old school” production and modern one.The watch was originally devised bearing a matte dial with tritium lume plots applied directly on it, later examples of reference 16660 feature gold-rimmed indexes and gloss dial, traits which will come to define the later production of Rolex diver’s watches.The caseback as well presents an evolution; early versions read “Rolex Patent” where as later versions were changed to “Rolex Oyster Original Gas Escape Valve”.

COMEX models, within the last decades have gained notability and rarity amongst the most avid Rolex aficionados. During the early days of deep sea exploration, Rolex worked with a number of experts in the field, including the Marseille-based company, COMEX (Compagnie Maritime d'Expertises) - a specialist diving company for the oil industry. COMEX and Rolex enjoyed a special relationship, and many watches were issued to their specialist divers over the course of decades, with their casebacks and dials marked “COMEX”. Like many “issued” Rolex watches, the inside case backs of COMEX watches would bear the full serial number (or in some instances the last 3 digits) corresponding to the number found between the lugs at 6 o'clock.The watch is offered in overall great condition and is a true testament of Rolex's commitment to professional diver’s watch.