The Prospex 1965 Revival Diver's 3-day 300m in Cove Black is a homage to Japan's and Seiko’s Diver's watch from 1965. Worn by the Japanese Antarctic Research Expedition from 1966-1969, it symbolizes Seiko's early dedication to diving reliability, safety, and professional standards, proving its durability in harsh environments. This version features a 40mm stainless steel case with a sapphire crystal glass surrounded by a deep cove black bezel and matching dial. It meets professional ISO Diving specifications with Lumibrite-coated hands and indices, and an upright date calendar at the 4.5 o'clock position for enhanced legibility. The bracelet has updated short pitch links, a shorter buckle for extra comfort, and a slimmer 13mm depth. Powered by the in-house built 6R55 automatic movement, it boasts an accuracy of -15/+25 seconds per day, a 72-hour power reserve, and 300m water resistance.