This replica deepsea 116660 is the 44mm full-size Deepsea that established Rolex as a serious player in extreme-depth diving watches. The 116660 reference carries a depth rating of 3,900 meters — nearly four kilometers beneath the surface — achieved through a case construction that includes a nitrogen-alloyed steel caseback ring and a 5.5mm-thick sapphire crystal. At 44mm on the wrist with a case thickness approaching 18mm, this is by far the most physically imposing watch in the entire Rolex range. The black dial keeps legibility straightforward with large luminous markers and a bold minutes hand.

Case & Movement Specs

• Case diameter: 44mm
• Case thickness: approximately 17.7mm
• Case material: Oystersteel
• Bezel: unidirectional rotating, ceramic insert
• Crystal: 5.5mm domed sapphire
• Water resistance rating: 3,900m (12,800ft)
• Bracelet: Oyster with Glidelock extension

The Glidelock clasp allows approximately 20mm of micro-adjustment without tools, which is essential for fitting the bracelet over a dive suit. The spring-loaded Fliplock extension adds even more length when needed.

Caliber Breakdown

Inside the 116660 sits an automatic caliber that drives hours, minutes, sweeping seconds, and a date display at 3 o’clock. The Deepsea case design uses what Rolex calls the Ringlock System — a compression ring sandwiched between the crystal and the caseback that allows both to withstand pressure independently. This engineering is what makes the 3,900m rating possible without making the watch entirely unwearable on land. The black dial 116660 is the original Deepsea colorway. For a different aesthetic within the same dimensions, look at the Sea-Dweller 126600 at 43mm or browse the full Deepsea catalog for gradient and gold options.

How It Compares

Next to the D-Blue 126660, the black 116660 is subtler and more traditional. It does not have the gradient drama but instead delivers a clean, high-contrast tool-watch face. The 44mm size means this is not a watch for slim wrists — it was built to be read at depth, in low light, through a face mask. For buyers who want the maximum Deepsea presence in the classic black dial configuration, this replica deepsea 116660 is the definitive version of that concept.