sentences:  Until the 2017 introduction of the reference number 126600, Sea-Dweller's were also distinguished by the absence of the date magnifier ("cyclops") present on most other Rolex models as it was impossible to attach a cyclops with Ultraviolet (UV) light curing adhesive at the top of a watch crystal exposed to the pressure encountered at its test depth.The Sea-Dweller diving watch range has been standard issue for Comex divers since 1977.The Sea-Dweller Submariner 2000 watches have two red text lines on the watch dial, which led to an unofficial "Double Red" designation by watch collectors.