This timepiece is a magnificent artifact of the Japanese Domestic Market (JDM), representing the avant-garde Vanac series that offered a more colorful, daring alternative to the standard King Seiko line. The reference 5626-7140 is defined by its breathtaking bronze-to-gold sunburst dial and an architectural faceted glass crystal that acts like a prism, creating a kaleidoscope of light across the markers. It is powered by the legendary Caliber 5626, a high-frequency 28,800 bph automatic engine known for its chronometer-grade potential, featuring a bilingual English/Kanji Day-Date complication that is a hallmark of authentic JDM pieces.

The architecture of this watch is pure "Grammar of Design" on steroids, featuring sharp, angular lugs and a uniquely integrated stainless steel bracelet with a specialized "XAB 421" end-link signature. The dial is a masterclass in texture, utilizing faceted, high-relief indices that match the geometry of the crystal perfectly. Flipping the watch over reveals a crisp caseback with the reference number and the serial 270999, definitively dating this specimen to July 1972. This is an essential acquisition for an elite collector who appreciates Suwa factory excellence, the funky retro-futurism of the 70s, and the absolute rarest "faceted" expressions of King Seiko history.