This 1978 Rolex Sea-Dweller Ref. 1665 is a remarkable vintage piece with stunning character and originality. Featuring a nicely aged patina on its tritium hour markers and hands, the watch exudes the charm that collectors seek in early Sea-Dweller models. The iconic stainless steel 40mm case retains its sharp lines, complemented by the original period-correct Oyster bracelet. Equipped with a domed acrylic crystal, the watch maintains its classic 1970s diving tool-watch aesthetic. The matte black dial with white text remains beautifully preserved, with even creamy lume that adds warmth and depth. Powered by the robust Caliber 1575 automatic movement, this Sea-Dweller combines functionality with timeless style. A true collector’s piece, this Ref. 1665 embodies Rolex’s deep-sea heritage and is a rare find in such well-preserved, honest condition.