The Rolex Sea-Dweller reference 16660, affectionately known as “the triple six”, was introduced in 1978 and marked the first time the SeaDweller had a sapphire crystal, a 4000 feet depth rating, quick set date and a larger and improved helium release valve.

The SeaDweller case is something to behold. All modern Rolex watches use the Oyster case – but really the other models should have their cases named “Oyster light” because the SeaDweller’s case is a behemoth in comparison. Stainless steel with dimensions of 40mm diameter by 15.5mm thick. Unlike other Oyster cases, the SeaDweller case has a helium release valve on the left case side, text on the case back, no Cyclops magnifier over the date and also the SeaDweller had solid end links for at least a decade before the Submariner finally got them.

Lastly, the bracelet links are thicker than a Submariner’s links. If you ever need to have a watch that will really live up to ANYTHING, then a SeaDweller is your watch.

Movement is the automatic winding Rolex Caliber 3035 with 27 jewels and adjusted to 5 positions and temperature. This is a C.O.S.C. Certified Chronometer movement. Quick set date (first time on a SeaDweller).

Bracelet is the Oyster reference 93160 with # 592 end links.