Replica Rolex Sea-Dweller 126603 Black Ceramic

The 126603 brought the Sea-Dweller line into Rolesor territory for the first time, combining Oystersteel with yellow gold plating on the bezel, crown, crown guards and bracelet center links. It is the only two-tone Sea-Dweller Rolex has produced in the modern era, pairing the tool-watch case with yellow gold details for wearers who want one watch for the office and the weekend.

Key Specifications

The 126603 Up Close: Case, Dial and Bracelet

Yellow gold-plated crowns the winding crown, crown guards and ceramic bezel insert, creating a warm contrast against the brushed Oystersteel flanks. The 43mm case shares its proportions with the steel-only 126600 but feels distinctly more luxurious thanks to the two-tone detailing that catches light on polished gold surfaces.

A black dial with gold-outlined hour markers and hands enhances legibility while reinforcing the two-tone theme. The date at three o’clock sits under a Cyclops magnifier, and the helium valve at nine o’clock remains fully functional.

See the all-steel alternative alongside other depth-rated references in the Deepsea collection.

Movement Options: Swiss vs Japanese

Two movement tiers power this two-tone Sea-Dweller:

• Swiss Automatic — 28,800 vph with approximately 70-hour power reserve. Chronergy escapement and paramagnetic hairspring deliver accuracy consistent with Caliber 3235 specifications.
• Japanese Automatic (Miyota) — 21,600 vph with around 42-hour reserve. Dependable daily performance with straightforward maintenance and global parts availability.

Both feature quickset date and hacking seconds for convenient time adjustment.