Patek Philippe 5085/1A-001 Neptune SS Black Dial

The Patek Philippe 5085/1A-001 “Neptune” is a rare and compelling expression of the brand’s late‑1990s steel sports‑luxury vision, produced from approximately 1998 until 2005. Its 37 mm tonneau‑inspired stainless steel case, measuring a slender 9.6 mm thick with a lug‑to‑lug of 43.8 mm, offers a sleek yet substantial wrist presence. The integrated steel bracelet with rounded, polished links and satin‑finished sides adds both comfort and visual intrigue. Beneath the sapphire display back resides the ultra‑thin automatic Caliber 240 PS IRM C LU (also referenced as 240/164), featuring a 22 k gold micro‑rotor, Gyromax balance, 29 jewels, and a 48‑hour power reserve—highlighting Patek’s mastery in marrying elegance and mechanical refinement. The black dial, with tritium lume, Arabic numerals, and a balanced layout of moon‑phase with pointer date at 7 o’clock, small seconds at 4 o’clock, and power reserve at 10 o’clock, demonstrates thoughtful design and legibility. Water‑resistant to 30 meters, this Neptune stands apart from the more ubiquitous Nautilus and Aquanaut, offering collectors a stealthy and sophisticated alternative with its blend of complications, integrated design, and limited production pedigree. Like New with Patek Philippe box, setting pin and papers dated 1999.