The Rolex DeepSea Sea-Dweller, model 116660 (aka 116660-BKSO) is powered by the Rolex caliber 3135 mechanical, automatic winding movement. It is a Certified Chronometer (COSC). The case is constructed from ultra tough 904L stainless steel with the Rolex patented Ring Lock System and a titanium caseback. At 44mm (approximately 48mm with the crown) and a thickness of about 18mm, this DEEPSEA weighs in at about 141 grams on the nato strap.

Model: 116660, 116660-BKSO
Movement: Automatic, Certified Chronometer (COSC) / Rolex caliber 3135
Case: Stainless steel, Ring Lock System, titanium caseback
Diameter: 44mm (approximately 48mm)
Thickness: 18mm
Weight: 141g/5.0oz
Dial: Black
Features: Date at 3:00
Bezel: Black ceramic (Cerachrom)
Band: Brown leather nato strap
Lug Width: 21mm
Crystal: Domed sapphire (5mm)
Depth Rating: 3,900m or 12,800ft, equipped with a helium escape valve
Crown: Screw-down
Includes: Includes COSC tag, and tag with matching serial number. No box/papers.
Condition: Mint
Retail Price: $12,050
Extra Info: This watch is a scattered series (Rolex serial number dates). Originally purchased in 2016.