Rolex Sea-Dweller 1665 MK4 Circa 1981 (7.265XXX Serial), excellent and unpolished case that shows some wear from use, excellent original MK4 tritium dial with strong patina and matching hands, the second hand has aged a bit lighter than the rest, excellent original MK3 black bezel insert in immaculate conditions, excellent original 93150 oyster bracelet with 585 endlinks that shows extremely light stretch for its age, claspcode is H, the serial and ref numbers between the lugs are crisp and well defined, caseback is stamped 1665, no service history, perfect working conditions