Rolex Sea-Dweller: Double Red vs Single Red

Rolex Seadweller 43mm 50th Anniversary Steel Mens Watch 126600

The Rolex Sea-Dweller stands as a paragon of dive watch engineering and design since its debut in 1967. Renowned for its unparalleled water resistance and robustness, it caters to the demands of professional divers. Among the plethora of Sea-Dweller models, those adorned with red text on their dials emerge as particularly coveted treasures. This distinctive red script not only sets these timepieces apart but also significantly enhances their appeal among collectors and aficionados of horology.

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Rolex Sea-Dweller 1665 "Single Red" (photo: Phillips)
Rolex Sea-Dweller 1665 “Single Red” (photo: Phillips)

What is the Rolex Sea-Dweller “Single Red”?

The Rolex “Single Red” Sea-Dweller Ref 1665 is a prototype dive watch introduced in 1967, distinguished by its unique red “SEA-DWELLER” text on the dial. This model, notable for its pioneering features, was developed to surpass the Submariner’s water resistance, initially offering up to 500 meters, a figure that later evolved to 610 meters with the “Double Red” Sea-Dweller.

Exclusively about twelve “Single Red” models were produced, never commercially sold but distributed to select divers for testing or recognition, making it exceedingly rare and a treasure at auctions where it fetches high prices.

Rolex Sea-Dweller 1665 "Single Red" (photo: Phillips)
Rolex Sea-Dweller 1665 “Single Red” (photo: Phillips)

Its construction includes a 40mm Oyster case, matte black dial, 27-jewel caliber 1575 Perpetual movement, and a distinctive date mechanism at 3 o’clock—uncommon among dive watches at the time, emphasizing its innovative design for prolonged underwater missions. The “Single Red” Sea-Dweller’s rarity, coupled with its historical significance and technical achievements, make it a coveted piece for collectors, embodying Rolex’s legacy in the evolution of dive watches​​​​.


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Rolex Sea-Dweller Double Red ref 1665 (photo: Christie's)
Rolex Sea-Dweller Double Red ref 1665 (photo: Christie’s)

What is the Rolex Sea-Dweller “Double Red”?

The Rolex Sea-Dweller “Double Red” Ref 1665, created through a collaboration with the French diving company COMEX, is a hallmark in Rolex’s dive watch lineage, produced from 1967 to 1977. Distinguished by two red lines of text on its dial—”SEA-DWELLER” and “SUBMARINER 2000″—it signified an advancement over the Submariner with a depth rating of over 2000 feet, incorporating the innovative Helium Escape Valve (HEV) for deep-sea explorations.

Rolex Sea-Dweller ref 1665 Double Red "Patent Pending" (photo: Christie's)
Rolex Sea-Dweller ref 1665 Double Red “Patent Pending” (photo: Christie’s)

This model underwent several dial iterations and caseback changes throughout its production, including the rare Mark I dial with a patent-pending caseback. Its design eschewed the cyclops lens for a more symmetrical dial under a domed acrylic crystal, enhancing its vintage appeal. Despite its decade-long production, finding a DRSD in original or near-original condition is a rarity, with values reflecting its iconic status among collectors. The “Double Red” Sea-Dweller remains a pivotal piece in Rolex’s diving watch history, embodying the brand’s commitment to innovation and functionality in professional dive watches​​​​​​.


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2017 Rolex Sea-Dweller 126660: A Homage to the Red Text

Rolex Seadweller 50th Anniversary (with Rolex Daytona)
Rolex Seadweller 50th Anniversary (with Rolex Daytona)

The Rolex Sea-Dweller reference 126600, launched in 2017 to celebrate the 50th anniversary of the Sea-Dweller line, is a testament to Rolex’s enduring commitment to excellence in dive watches. This model reintroduces the iconic red text on the dial, a nod to the “Single Red” and “Double Red” Sea-Dwellers, underscoring the brand’s rich heritage in deep-sea exploration. With a 43mm case size, up from the traditional 40mm, it aligns with modern preferences for larger watches while maintaining the robust functionality expected from a professional diver’s watch​​​​​​.

The 126600 model features several technical and aesthetic updates, including a Cerachrom ceramic bezel, a “Maxi” dial with larger hour markers and wider hands filled with Chromalight for superior visibility in dark conditions, and a helium escape valve, retaining its capability for saturation diving. Notably, this model is water-resistant to 1,220 meters (4,000 feet), a significant achievement that underscores its utility for professional divers​​.

Rolex Sea-Dweller 50th Anniversary ref 126600
Rolex Sea-Dweller 50th Anniversary ref 126600 (photo: Rolex)

Furthermore, the inclusion of the Cyclops lens on the sapphire crystal above the date display marks a departure from previous Sea-Dweller models, enhancing date legibility while stirring discussion among Rolex enthusiasts​​. The watch is powered by Rolex’s Caliber 3235 movement, offering improvements in precision, power reserve, and resistance to environmental factors, making the 126600 not only a piece of Rolex’s diving legacy but also a forward-looking iteration that reflects the latest in watchmaking technology​​.

This model, dubbed the “Anniversary Sea-Dweller” or “Sea-Dweller 43” due to its release timing and case size, encapsulates the evolution of the Sea-Dweller series from a tool watch for the diving professional to a modern luxury timepiece that respects its roots while embracing the future​​.


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Final Thoughts

The “Single Red” and “Double Red” Sea-Dwellers hold a special place in the annals of Rolex’s history, embodying the brand’s commitment to excellence in professional dive watches. These models, with their distinct red inscriptions, not only serve as functional tools for divers but also as coveted collectibles that capture the essence of Rolex’s innovative spirit. The 2017 Sea-Dweller 126660, with its nod to the past through the red text, underscores Rolex’s ability to honor its heritage while pushing the boundaries of watchmaking.

Rolex Sea-Dweller 50th Anniversary (center) with Deepsea D-Blue and Deepsea 44
Rolex Sea-Dweller 50th Anniversary (center) with Deepsea D-Blue and Deepsea 44

As the interest in these vintage and modern Sea-Dwellers continues to grow, platforms like SwissWatchExpo provide enthusiasts and collectors with the opportunity to own a piece of Rolex’s illustrious history. Whether it’s the extreme rarity of the “Single Red”, the historical significance of the “Double Red”, or the modern appeal of the 2017 Sea-Dweller, each model offers a unique story and an enduring legacy of Rolex’s innovation and design excellence in the realm of professional diving watches.

Explore our vast collection of Rolex Sea-Dweller models, along with thousands of authentic, pre-owned luxury watches from the world’s best brands, at SwissWatchExpo.com.

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Rolex Submariner and Sea-Dweller Watches Review

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