Double Red Sea-Dweller Ref.1665-0 DRSD Mark III

Rare Rolex Double Red Sea-Dweller Ref.1665-0 DRSD Mark III from 1977

DRSD Production: 1969-1977
Case Serial No: 5193XXX; Circa 1977
Movement: Mechanical, self-winding calibre 1575; Breguet hairspring; 25 jewels; 2.75 Hz/19,800 vph; 48-hr power reserve; hacking seconds
Case: 40mm x 19mm Oyster steel "thick case" with "ROLEX PATENT" and straight 'ROLEX' inscription on outer case-back; bi-directional steel bezel with Fat Font insert; Superdome 'Tropic 39' Plexiglas crystal; helium valve; 7mm Triplock winding crown; 20mm lug width
Dial: Matte black MK4 DRSD dial with tritium Maxi Markers and Mercedes hands; 'SEA-DWELLER' and 'SUBMARINER 2000' in RED; larger '2000ft=610m' depth rating print with "closed 6" and 'SCOC' text in white; 'SWISS-T>25' 
Strap: 93150/585 (20mm End Link) Oyster solid-link bracelet with Fliplock clasp and diver's extension link; "LT1" clasp code (01/2009)

Purchased from Andrew Shear of ShearTime, NYC in 01/2013
Note: RSC S'pore receipt for new Oyster bracelet dated 28/03/2013.

- Authentication & Verified by Swiss WOSTEP in-house watchmaker.