Rolex Sea-dweller 16660 MK1 Matte Dial 1985 The non-luminous dial is champagne

The non-luminous dial is champagne colour with a horizontal brush finish and delicate yellow gold hands

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Serial 255xxxx dating to 1971

and softens more and more over time

Rolex Sea-dweller 16660 MK1 Matte Dial 1985 The non-luminous dial is champagneWith this Sea Dweller, also nicknamed the Triple Six, Rolex doubled the depth rating to 4,000 ft thanks to its larger helium escape valve and sapphire crystal, compared to its predecessor, reference 1665. Furthermore, Rolex introduced a unidirectional bezel for diver safety, making this Sea Dweller a true transitional model. This example features a rare matte dial, used in the first production batch before Rolex later switched to glossy dials with