- When it comes to dive watches, Rolex is undoubtedly the first watchmaker that comes to mind, thanks to its rich history of producing exceptional timepieces for underwater exploration. Renowned for their robustness and impeccable build quality, Rolex has always been at the forefront of the industry. Since the introduction of the Submariner in 1953, Rolex has continuously strived to innovate and enhance their watches, aiming for superior quality and the ability to conquer even greater depths.

- In 1967, after years of dedicated research and development, Rolex introduced their first Sea-Dweller model, the 1665. This groundbreaking timepiece featured a helium escape valve, allowing it to withstand extreme depths. The results were so impressive that the patent for this innovative feature was granted in 1970, and the helium escape valve has been a staple in the Sea-Dweller lineup ever since.

- The present 1665 model showcases a highly sought-after “Great White” MK I dial, identifiable by the distinctive "open 6" numeral. MK I dials were produced for watches with serial numbers ranging from 5.18 million to 6.2 million. The current lot, with a case number of 6.1 million, perfectly aligns with this production period and dates back to 1979.

- Despite its age, the watch remains in excellent condition, boasting a strong case and a very attractive dial that exhibits an evenly aged luminous material, resulting in a captivating light yellow patina.