Up for sale is a King Seiko 45-8010 Chronometer from July 1970, one of the pinnacles of Japanese watchmaking. Quick Specs Condition: Beautiful vintage condition, sharp case lines, intact gold medallion caseback. Service: Freshly serviced, running strong. Movement: Manual-wind Caliber 4520A Hi-Beat (36,000 bph), chronometer-rated. Dial: Clean silver, no date window (pure dresswatch aesthetic). Details: KS signed crown, applied KS logo, \~36mm case size. Price: $600 shipped (tracked worldwide shipping included). Why this watch matters In the late 1960s, Grand Seiko (Suwa) and King Seiko (Daini) were in a heated rivalry to build the most accurate mechanical watches in Japan. The 45KS Chronometer series was the answer: a manual-wind, hi-beat chronometer-grade movement regulated to compete with the best Swiss houses. The Cal. 4520A is considered one of Seiko’s finest hand-wound calibers — beating at 36,000 bph for precision — and the “Chronometer” inscription is historically significant, as Seiko stopped using it after disputes with Swiss COSC. The 45-8010 reference stands out as one of the purest executions: no date window, sharp Grammar of Design case, and a gold medallion caseback. Collectors often call King Seiko the sleeper line, but this model shows it deserves to be mentioned in the same breath as vintage Grand Seiko. A true gem from July 1970 — clean, serviced, and ready for the next collector.