Vintage Watch | Seiko 4502-7000 (45KS) 36000bph

Vintage King Seiko 4502-7000 45KS: Unpolished Case, Perfect Silver Sunburst, July 1969 (Fully Serviced)

King Seiko was Seiko’s second flagship — built to stand next to Grand Seiko and to prove Japanese watches could beat Swiss ones on Swiss terms. The 45KS is the generation that came out of that fight. This July 1969 4502-7000 is the first-generation date 45KS: Daini high-beat hand-wind, unpolished steel, and a silver sunburst dial that has not aged at all.

How the 45 Movement Was Born: Neuchâtel and Geneva

In the mid-1960s Seiko sent both factories — Suwa and Daini (Kameido) — into the Observatory Chronometer Competitions at Neuchâtel. The first year was a humiliation. In 1964 Suwa finished 144th and Daini 153rd; neither batch even qualified as chronometers. The brief after that was simple: raise the beat, master the balance spring, and come back.

They did. High-frequency balances (10 beats per second and, in the special contest pieces, even faster) plus better hairspring theory flipped the table in three years. By 1967 Daini took 2nd and Suwa 3rd in the company prize at Neuchâtel; Daini’s contest calibre 052 placed as high as 4th against the best Swiss mechanicals. In 1968 the Neuchâtel wristwatch contest was cancelled. Seiko went to Geneva instead. Suwa’s mechanical entries took 4th through 10th — the top mechanical scores that year — with a record 58.19 points for a mechanical wristwatch. First to third at Geneva were Swiss quartz prototypes. The mechanical podium was Japanese.

Those contest movements were not this production 4502. They were purpose-built observatory calibres. What came home to the factory was the knowledge: 36,000 bph, tighter regulation, and a production 45-series family that could be sold. Daini put that work into Grand Seiko 45GS (4520 / 4522 / later 4580 V.F.A.) and into King Seiko 45KS (4500 no-date, 4502 date). In 1968–70 Daini also sent production 45-series movements back to Neuchâtel for certification; 226 passed and were sold as Seiko Astronomical Observatory Chronometers. The Seiko Museum is blunt about the rest: the precision learned in Switzerland was applied to Grand Seiko and King Seiko.

So a 4502-7000 is not an observatory prize watch. It is the King Seiko you could actually buy — same Daini 45 architecture, same 36,000 bph lesson, last KS generation with a fully hand-finished 10-beat movement.

Vintage Seiko Caliber 4502A

Manual-wind, 25 jewels, 36,000 bph, hacking seconds, quick-set date with a clean midnight jump. Thin, sharp, and meant to be wound every day. This example has just been fully serviced by our watchmaker in Japan and is keeping excellent time.

The 7000 Case and This Dial

The 4502-7000 is the earlier 45KS shape: planes and elongated lugs, closer to Grammar of Design than the later cushion 7010. About 36.5 mm, 41.5 mm lug-to-lug, 18 mm lugs, roughly 9 mm thick. This dial is the reason to buy this one — perfect silver sunburst, no aging, no patina, no reprint. The case has never been polished. Factory brush and mirror work remain. There is light wear on the upper-right side; overall the case is good and original.

Specification

Maker: Seiko (Daini / Kameido)

Model: King Seiko 4502-7000 (45KS)

Era: July 1969

Case Diameter: 36.5 mm

Lug to Lug: 41.5 mm

Lug Width: 18 mm

Case Condition: Unpolished original steel; factory finishes retained; minor marks on the upper-right side; overall good. Gold Madellion in perfect condition.

Dial Condition: Perfect silver sunburst — no aging, no patina

Movement: Manual Caliber 4502A, 25 jewels, 36,000 bph, hacking, date; just serviced by our watchmaker in Japan, keeping excellent time

A vintage King Seiko 4502-7000 with a perfect silver dial and an unpolished 1969 case is the wearable end of the observatory story: not the gold contest piece, but the 45KS that carried the same high-beat idea onto a wrist. Pair it with our premium Grand Series strap and it is ready.