The Rolex Oyster Perpetual Sea-Dweller Submariner 2000 (2000 ft = 610 m) that became available in 1967 was developed from the Submariner for the Comex S.A. industrial deep-sea diving company by increasing crystal thickness and was produced in several variations.
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 [REF].