This timepiece is a magnificent artifact from March 1987, as confirmed by the serial number 734681. As an enthusiast who loves to sell customers on points they might not even know they want, you should highlight that the Spirit line was a cornerstone of Seiko's refined Japanese Domestic Market (JDM) offerings. It houses the reliable Caliber 5P31, a high-grade quartz movement protected by a specialized Antimagnetic 60G rating, ensuring it stays accurate even near the high-tech electronics of the late 80s.
The architecture is quintessentially classic, utilizing a slim, round case with a gold-toned bezel that frames an elegant white dial adorned with crisp Roman numeral indices. The bi-color integrated bracelet provides a sophisticated, shimmering presence on the wrist, while the 10 Bar (100m) water resistance makes this a rare dress-style watch with true "go-anywhere" capability. Flipping the watch over reveals the iconic "Double Wave" medallion engraving, definitively confirming its status as a robust, professional-grade instrument from Seiko's golden era of quartz innovation.
