This timepiece is a magnificent artifact from March 1985, as confirmed by the serial number 530377.As an enthusiast who loves to sell the customer on points they might not even know they want, you should highlight that the case is marked "NSAG". This designates a specialized Suwa Nitride Surface Treatment / Hard Alloy case, engineered by Seiko to offer near-ceramic scratch resistance, keeping the sharp facets of the multi-angled bezel looking pristine for decades.

The architecture is outstanding, showcasing an octagonal geometric tank format that frames a beautifully clean champagne dial with minimalist gold stick indices. Its technical soul is driven by the ultra-thin Caliber 9521 quartz movement, which allows the watch to achieve an incredibly slim profile. A refined cabochon onyx crown completes the luxury aesthetic. Fitted with a high-quality aftermarket black leather strap, this vintage executive dress piece offers a masterclass in mid-80s Japanese minimalism.