Vintage Seiko Spirit Watch — Gold-Plated Sweeping Seconds (1989)

Seiko Spirit — Vintage Quartz Sweep Seconds, the Ancestor of Spring Drive This vintage Seiko Spirit watch, from the Contemporary Basic line and dated 1989, hides beneath its classic dial one of the most fascinating movements in Seiko history: the 5S21 caliber with sweep seconds. Where an ordinary quartz ticks second by second, this piece displays a smoothly sweeping seconds hand, like a mechanical watch — a rare feat, regarded by collectors as one of the prototypes of the philosophy that would give birth to Spring Drive. The round gold-plated case, understated and luminous, adopts the timeless codes of the dress watch: clean lines, slender lugs, and a discreet bezel. With a 34mm diameter and an ultra-thin 6.3mm profile, it sits with effortless elegance, as fitting on a man's wrist as on a woman's wrist for those who appreciate dress watches. The white dial is a model of classic refinement: its black Roman numerals framed by a fine numbered minute track ensure elegant legibility, while the double signature SEIKO Contemporary Basic and Spirit structures the composition. The blue hands add a subtle touch of color and stand out beautifully against the light background, highlighting the sweeping seconds hand that makes the piece so magical. Protected by a mineral crystal in excellent condition, this Seiko Spirit is fitted with a brown crocodile-style leather strap that warms the overall look and enhances its dressy character. A rare and little-known vintage watch, ideal for the enthusiast seeking a technical piece with a discreet aesthetic. Selected, authenticated, and serviced by Atelier Victor. Fast and secure international shipping. Three points to note about this piece Rare Seiko 5S21 caliber with sweep seconds: a quartz movement that sweeps like a mechanical one, regarded as an ancestor of Spring Drive. Movement produced only around 1988-1989: a technical and discreet piece, sought after by collectors. White dial with Roman numerals and ultra-thin gold-plated case: the classic elegance of a true dress watch. See our other vintage Seiko watches → | See all our vintage Japanese watches → Technical specifications Brand: Seiko Model: Spirit (Contemporary Basic) Reference: 5S21-7000 Estimated year: 1989 Serial number: 950437 Origin: Japan Gender: Unisex watch (Unisex, slim wrists) Movement: Japanese quartz with sweep seconds, Seiko caliber 5S21 Functions: Hours, minutes, seconds (sweep seconds) Case: Gold-plated (steel back), round shape Dimensions: 34mm (35mm with crown) Lug to lug: 39mm Thickness : 6.3mm (Crystal included, ultra-thin) Lug width : 18mm Crown : Gold-plated, original Dial : White, black Roman numerals, numbered minute track, signature Seiko Contemporary Basic and Spirit, original Hands : Blue, original Crystal : Mineral, very fine condition Bracelet : Brown crocodile leather, not original Buckle : Steel buckle, not original Condition and warranty Overall condition : Very fine state of preservation. Impeccable original white dial, intact blue hands, functional sweeping seconds hand, Crystal mineral in very fine condition. Water resistance : Not guaranteed (vintage watch) Authenticity : Lifetime guarantee Movement : Checked quartz movement, one-year warranty Included : Atelier Victor invoice, protective case Not included : Original box and papers Frequently asked questions What is the sweeping seconds hand of the 5S21 caliber? The 5S21 caliber is a Seiko quartz movement fitted with a smooth sweeping seconds hand, unlike the ticking second-by-second motion of most quartz movements. Thanks to a balance spring and regulator integrated into the gear train, the seconds hand glides continuously, just like on a mechanical watch. On the wrist, the illusion is complete: many people mistake it for an automatic. Why is this movement sought after? The 5S21 was produced only for a very short period, around 1988-1989, and represents a technical curiosity in the history of Seiko. Collectors often consider it one of the milestones that led to the celebrated Spring Drive movement of Seiko, which revisits the principle of a perfectly fluid seconds hand. It is a rare and discreet piece. Does this movement operate at high frequency? No, the 5S21 operates at the standard quartz frequency of 32,768 Hz. Its distinctive feature does not come from a high frequency, but from its mechanical regulating system (balance spring and viscous regulator), which transforms the jerky advance of the motor into the continuous sweep of the seconds hand. It is this ingenuity, not the frequency, that makes it unique. Is this watch suitable for a man or a woman? With its 34mm round case, it is a Unisex piece, elegant on the wrist of both a man and a woman. Its Roman numeral dial and gold-plated case make it an ideal dress watch for formal wear. What is the international shipping time? Dispatch within 48 hours, international delivery within 3 to 5 days, insurance included.