In 2005, a long Rolex tradition came to an end, at the same time as the new box was introduced. The anchor accessory, which had been added to each Submariner and Sea-Dweller model up till then, was discontinued. New models only come without the anchor.
Much has been written about this anchor over the years, but why Rolex added it in the first place is still unknown, nor what you should do with it. Perhaps this is the reason, coupled with the cost-saving benefit to Rolex, why Rolex took this step.
A few years have now passed and the anchor is now coveted by collectors to complete a watch package.