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The Rolex Sea-Dweller Ref. 126600 MK1, introduced in 2017 to celebrate the 50th anniversary of the model, is a milestone in the brand’s professional dive watch line. This sought-after MK1 version is the first production series, recognizable by its red “Sea-Dweller” text and the absence of the Rolex coronet between “Swiss Made” on the dial.
The 43 mm Oyster case in 904L stainless steel features a helium escape valve, offering water resistance up to 1,220 meters / 4,000 feet. The unidirectional black Cerachrom bezel with platinum-coated numerals is scratch- and corrosion-resistant. The matte black dial includes luminous Chromalight markers for optimal legibility.
Powered by the Rolex calibre 3235, this automatic movement features the Chronergy escapement, COSC certification, and a power reserve of approximately 70 hours.
This 2017 example is in excellent condition and is offered complete, with its original Rolex box, warranty card, manuals, and tags.
Key specifications:
Reference: 126600
Version: MK1 (first series, red text, no coronet on dial)
Case: 904L Oystersteel, 43 mm
Bezel: Black Cerachrom, unidirectional, platinum-coated numerals
Crystal: Sapphire with Cyclops lens
Dial: Black with red “Sea-Dweller” text, no coronet
Movement: Rolex calibre 3235, automatic, COSC certified
Power reserve: Approx. 70 hours
Functions: Hours, minutes, seconds, date
Helium valve: Yes
Water resistance: 1,220 m / 4,000 ft (122 ATM)
Bracelet: Oyster with Glidelock clasp + Fliplock extension
Year: 2017
Includes: Original Rolex box, warranty card, manuals, tags
Condition: Excellent

