The Rolex Submariner Date Reference 116613LB is two-tone stainless steel and 18k yellow version of Rolex’s iconic dive watch with a blue dial and matching blue Cerachrom bezel. Produced from 2009 until 2020, the Ref. 116613LB is the first two-tone stainless steel and 18K yellow version of Rolex’s iconic dive watch. 116613LB is the first two-tone Submariner with a ceramic bezel insert and the last Rolex dive watch with a case diameter of 40 mm before updating the entire Submariner collection to a 41 mm case. While blue has a long history of appearing on various models in the replica Rolex Submariner collection, it has only appeared on two-tone and solid gold references, and two-tone Submariner watches with blue dials are often nicknamed “Bluesy” in some collector circles. 
Rolesor is the iconic Rolex term for the use of both stainless steel and gold components on a single watch, and the Yellow Rolesor is the variety that pairs stainless steel with 18k gold. In addition to the stainless steel and solid gold versions of the Submariner, Rolex also produces the Rolesor version, which has been a cornerstone product of the brand’s catalog since the mid-1980s. Two-tone watches have been present in the Rolex catalog since the 1930s, and many consider the two-tone aesthetic to be a symbol of the Rolex brand.
With its Maxi dial, Cerachrom bezel, solid link Oyster bracelet, and updated case proportions, the Reference 116613LB is a completely modern watch that could easily be mistaken for a current production model. However, the movement inside is the older Caliber 3135, which first appeared in the late 1980s and has been used to drive the date display on countless Rolex replica models over the years.
Like all modern Rolex Submariner fake watches, the 116613LB features a depth rating of 300 meters, a scratch-resistant sapphire crystal, and the brand’s signature Cyclops magnifying glass above the date window at 3 o’clock. In addition, like the current production model, the Rolex Submariner ref. 116613LB features an Oyster bracelet with solid links. It allows instant adjustment of the bracelet length in 2 mm increments up to 20 mm without the use of tools.
Although the official case diameter measurement for the 116613LB is 40 mm, the 116613LB’s official case diameter is 40 mm, but its “super case” design with substantially thicker lugs and the crown guard gives the watch an overall look and feel more similar to the 41 mm case currently in production.
