The major difference between the Rolex Sea-Dweller and the Submariner is that the Sea-Dweller has greater water resistance and a helium release valve that allows trapped helium molecules to safely escape from the case without damaging the replica watch. This model is the first-ever fake Rolex Sea-Dweller watch. The Ref. 1665 was not only the first version of the Rolex Sea-Dweller but also the only version of the watch. 1665 was also the only version of the Sea-Dweller ever to feature an acrylic crystal. All subsequent models were equipped with a flat glass made of scratch-resistant synthetic sapphire crystal, but the Sea-Dweller 1665 was made with a curved glass made of thick Plexiglas, which gave it a special vintage look and feel. In addition, the reference 1665 is the only version of the Sea-Dweller ever to characterize a 610-meter depth indication, and it is the only Sea-Dweller model to feature a movement without a quick-setting date.
Despite having only one reference number, the incredible amount of variation in the Rolex Sea-Dweller 1665 watch makes it a popular choice for many collectors today. While all examples feature a 40mm stainless steel case, bi-directional chronograph black bezel, and an arched acrylic crystal, there are a variety of dials on the surviving Reference 1665 watches.
The “Double Red” version of the Rolex Sea-Dweller ref. 1665 was produced from approximately 1967 to 1977; however, many of these double red Sea-Dweller dials were replaced by later versions with white lettering during repairs and routine maintenance. As a result, only a small percentage of the original double red examples exist today, and the DRSD is a very popular vintage replica Rolex watch among serious collectors.
Given that the Rolex Sea-Dweller ref. 1665 has been out of production for decades, the second-hand market is now the only place to buy them. Although not as common as their older Submariner siblings, replica Rolex Sea-Dweller 1665 watches are still readily available on the pre-owned market, although you will have to do some searching to find one that meets the correct criteria in terms of dial type and overall condition.
In addition, with the wide variety of dials available, Rolex Sea-Dweller reference 1665 watches are available in an incredibly wide range of prices. For example, the COMEX Sea-Dweller 1665 is by far the most expensive watch with a guaranteed price in the six-figure range – assuming you’re lucky enough to find one for sale.
The copy Rolex Sea-Dweller ref. 1665 is one of the most important dive watches ever released by the brand. Not only was it the first Sea-Dweller to be introduced to the public, but it was also one of the first commercially available professional dive watches to be equipped with a helium release valve. Whether you appreciate this watch for its important role in history, or simply because you are looking for a purposeful tool watch in the golden age of mechanical watches, the Rolex Sea-Dweller 1665 is a true vintage classic and a great addition to any luxury watch collection.