In 1977, the Rolex Sea-Dweller (Ref. 1665) received an updated dial configuration. This new dial configuration is sometimes referred to as the "Great White". This updated dial differs from the previous variants, as the dial states the model Sea-Dweller and the writing Submariner 2000.
This specific example from 1978 preserves it's era-correct MK dial configuration.
• Black dial, domed crystal, two lines of white writing on the dial
• Stainless steel, case back engraving
• HEV (Helium Escape Valve) - 2000 feet 610 meters
• Date displayed
• Unpolished, screw-down crown, mechanical self-winding (no battery)
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