Vintage Seiko Dolce 5S21-6010 — Smooth Sweeping Seconds Hand (1990)
Only 1 available
Shipping from Europe — taxes and customs duties are the buyer's responsibility outside the EU
Lifetime authenticity guarantee
Serviced movement & 1 year warranty
International shipping
Photo taken on a 17.5 cm wrist
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Seiko Dolce vintage: a quartz with sweeping seconds hand
This Seiko Dolce watch is an elegant two-tone dress watch, with a rare and immediately visible distinction: its seconds hand does not “tick,” it sweeps. Powered by the Seiko 5S21 quartz with continuous sweep, it mimics the fluid motion of an automatic watch. Produced around 1990, in a round steel case enhanced with gold, it wears beautifully on both a man’s and a woman’s wrist. A characterful piece for the discerning collector.
The heart of this Seiko is its greatest asset: the 5S21 calibre, a quartz movement with a sweeping seconds hand developed by Seiko in the late 1980s. Where a conventional quartz movement steps forward in one-second increments, the 5S21 transforms this impulse into a perfectly fluid sweep, thanks to a spiral spring and a viscous regulator. On the wrist, the illusion is total: one would swear it is a mechanical watch. Produced in limited quantities and now sought after, this rare calibre bears witness to Seiko’s research, which would later lead to Spring Drive.
The silver dial, with fine vertical stripes and a subtle shimmering effect, catches the light delicately. It bears the signature “Seiko” and the name “Dolce”, a Roman numeral at 12 o’clock and slender applied gilt baton indexes. The round brushed steel case is enhanced by a bezel and lugs gold-plated, in a typically dressy two-tone spirit. The domed sapphire Crystal, particularly scratch-resistant, protects the whole.
With its 32.5mm case and slim profile, this vintage watch wears beautifully on both a man’s and a woman’s wrist — a true Unisex watch. The original dial and hands are in very fine condition, as is the sapphire Crystal. It is fitted with a genuine black crocodile leather strap, not original, with a steel pin Buckle.
Three points to note
- Vintage two-tone Seiko Dolce watch (steel and gold-plated), shimmering silver dial, domed sapphire Crystal (circa 1990).
- Rare 5S21 calibre with sweeping seconds hand: a fluid-sweep quartz that mimics a mechanical movement.
- Unisex watch (men’s and women’s), slim and dressy profile; a sought-after piece for Seiko enthusiasts.
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Technical specifications
- Brand: Seiko
- Model: Dolce (SACW012), two-tone
- Reference: 5S21-6010
- Estimated year: 1990
- Origin: Japan
- Gender: Men’s and women’s watch (Unisex)
- Movement: Japanese quartz with sweeping seconds hand, Seiko 5S21A calibre (continuous sweep)
- Functions: Hours, minutes, seconds (sweeping seconds hand)
- Case: Brushed steel, gold-plated bezel and lugs (steel caseback), round shape
- Dimensions: 32.5mm wide (35mm with the crown)
- Lug to lug: 36mm
- Thickness: 6.8mm (Crystal included)
- Lug width : 17mm
- Crown: Gold-plated with a black cabochon, original
- Dial: Silvered, fine vertical stripes (sparkling effect), Roman numeral XII, applied gold baton hour markers, signatures « Seiko » and « Dolce », original
- Hands: Hours and minutes, fine central sweeping seconds hand, original
- Crystal: Domed sapphire crystal, very good condition
- Bracelet: Genuine black crocodile leather, not original
- Buckle: Steel pin buckle, not original
Condition and warranty
- Overall condition: Very fine condition. Original dial and Crystal sapphire crystal in very good condition.
- Water resistance: Not guaranteed (vintage watch)
- Authenticity: Lifetime guarantee
- Mechanical: Checked quartz movement, one-year warranty
- Included: Atelier Victor invoice, protective case
- Not included: Original box and papers
Frequently asked questions
Why does the seconds hand of this Seiko sweep instead of ticking?
Thanks to its 5S21 calibre, a quartz movement with a sweeping seconds hand. A hairspring and a viscous regulator transform the motor impulse into a continuous, fluid sweep, very close to that of a mechanical watch — even though it is a quartz movement.
Is the 5S21 calibre rare?
Yes. Produced by Seiko from the late 1980s and now discontinued, this continuous-sweep movement was made only in limited quantities. It is particularly sought after by enthusiasts, especially as it forms part of the research by Seiko that would later lead to Spring Drive technology.
What is the Seiko Dolce line?
Dolce is Seiko's collection of extra-thin dress watches, designed to offer elegant and refined timepieces. This two-tone version, in steel and gold-plated, is a fine example: understated, slim, and dressy.
Is the Crystal resistant?
Yes. This watch is fitted with a domed sapphire crystal Crystal, the most scratch-resistant material after diamond. The dial is thus protected and remains legible over time.
Is this Seiko watch suitable for a man or a woman?
It is a unisex watch. Its 32.5 mm round case suits both masculine and feminine wrists. Its dressy, two-tone character makes it an elegant watch for every occasion.
Mechanical warranty — 1 year
Each watch is inspected by our watchmakers before shipping. In case of a mechanism malfunction during the first year, we cover the repair.
Authenticity warranty — lifetime
If a watch turns out to be non-authentic, we will take it back and refund you in full. Without time limit.
What is not covered
- Exposure to water or humidity
- Shocks, impacts, or vibrations
- Consumable parts (strap, Crystal, crown, pushers)
- Battery replacement (quartz movements)
- Opening or disassembly of the watch by a third party
- Improper use
The accuracy of vintage watches varies according to the model, movement, and year of production. A request for accuracy improvement deemed within acceptable tolerances cannot be covered by the warranty.
Shipping fees
After-sales service is free. Shipping fees outside the United Arab Emirates remain the responsibility of the customer.
Authentication Process
Each watch is examined by our partner watchmakers before being offered for sale: verification of authenticity, checking the conformity of the components, identification of any modification or replacement of original parts.
If any element has been replaced during the life of the watch (dial, hands, crown, Crystal, strap), we systematically indicate it in the product sheet. You buy knowing the exact history of your piece.
Certificate of Authenticity
Your Atelier Victor invoice serves as a certificate of authenticity: it attests to the origin and conformity of the piece, and is covered by our lifetime authenticity guarantee — if a piece sold by Atelier Victor were found to be non-authentic, it would be fully refunded, with no time limit.
We accept several payment methods:
- Bank card (Visa, Mastercard — American Express not accepted)
- Bank transfer (AED, EUR, USD)
- Cryptocurrency (USDT, USDC)
- PayPal
Other currencies accepted upon request. Exchange fees of approximately 3% may apply.
A 3% discount is granted for any payment by bank transfer starting from €1,000.
Does the strap not suit you? Add the strap of your choice to your order: we will fit it to your watch before shipment, at no fitting charge.
International Shipping
Shipped within 48 to 72 business hours by DHL Express or an equivalent carrier depending on the destination. Delivery in 2 to 6 business days. Each shipment is insured and delivered against signature.
- Free delivery from €1,000 of purchase, as well as on the Jewelry Atelier Victor
- Tracking number sent as soon as the shipment is dispatched
- For certain destinations, delivery may be made to a secure collection point in order to guarantee the integrity of the shipment
Pickup in Dubai
Hand delivery by appointment in Downtown, Dubai. Make an appointment.
Taxes and Customs
The shipping origin is indicated on each product sheet. If the delivery country differs from the shipping country, customs duties and taxes may apply upon receipt, at the buyer's expense. In exceptional situations, customs checks may extend the delivery time, regardless of our wishes and those of the carrier.
For full details, please consult our shipping policy.
FINAL SALES
All sales are final: no return, exchange, or cancellation is accepted after order confirmation. Each piece is authenticated, inspected, and described in detail before being offered for sale.
BEFORE PURCHASE
Our advisors remain at your disposal for any questions and can send you additional photographs or videos upon simple request, by email or on WhatsApp.
NON-CONFORMING ITEM
In the exceptional case of an item that does not match its listing, please notify us within 72 hours: it will be eligible for a refund or an exchange. If the parcel shows damage upon delivery, it should be refused or its opening filmed continuously.
For full details, please consult our return policy.
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Authenticated, checked, and photographed by us. As all sales are final, our team remains available 7 days a week on WhatsApp to answer your questions, share additional photos or a video of the piece in hand — so that your choice can be made with complete peace of mind.
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