<https://lunaroyster.com/product/1977-rolex-sea-dweller-ref-1665-faded-double-red-mk4-last-batch/#product>
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"Up for grabs is a Rolex Sea-Dweller Reference 1665 5.2 mil serial number at the very end of Double Red productionExcellent vintage condition case. Thick lugs and crown guards. Clear numbers, corrosion or pitting. Dial is original, in poor condition. The red print is faded but still visible. The dial is MK4 double red. Most of the luminous material is gone. There are stains on the dial. Date disk with open 6’s and 9’s. Original bezel and insert. Caseback is original and correct for this batch of DRSD’s with rounded print on outside, no serial number inside and I.72 date. Open 6’s and 9’s datedisk. Watch runs fine. Comes on strap. No box or papers."
<https://lunaroyster.com/product/1977-rolex-sea-dweller-ref-1665-faded-double-red-mk4-last-batch/>