Vintage Seiko Quartz Square 7820-5430 — Silver Dial (1979)
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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The purity of a dress square signed Seiko
This Seiko embodies the understated elegance of Japanese dress watches. Its square steel case, with delicately softened angles, follows a remarkably slim profile that slips easily under a cuff. Heir to the expertise of Seiko, the global pioneer of the quartz watch, it combines electronic precision with classic aesthetics. A sober, timeless piece, at ease in any setting.
The silver dial, with its satin finish, embraces purity: applied baton hour markers, finely beveled, catch the light around the double signature « Seiko Quartz ». The Seiko emblem appears at 6 o’clock, while two steel baton hands indicate the hours and minutes, without a seconds hand, for a clean read. Nothing superfluous: legibility and balance take precedence, in the finest tradition of the dress watch.
At the heart of this Seiko beats the caliber 7820, a high-end analog quartz movement produced by the manufacture between the late 1970s and the 1980s. Renowned for its slenderness, it equipped extra-thin dress watches prized by collectors. The quartz offers greater precision than most mechanical movements and effortless everyday use: a simple battery is enough to drive it for years.
With its 29mm case and its Lug width of 19mm, this Seiko can be worn equally well on a man’s or a woman’s wrist, in a dress and vintage register. The original silver dial is in very fine condition, as is the mineral Crystal. The watch is fitted with a handmade green crocodile leather strap, recently installed: its muted tone adds a touch of originality to the whole. The steel crown is original; the strap and the Buckle are not.
Three points to note
- Case square steel case with softened angles, slim profile, satin silver dial with applied markers.
- Seiko quartz movement 7820, high-end, two hands (hours and minutes), no seconds hand.
- Original dial in very fine condition; handmade green crocodile strap (not original), original crown.
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Technical specifications
- Brand: Seiko
- Model: SQ (Seiko Quartz), square
- Reference: 7820-5430
- Estimated year: 1979
- Origin: Japan
- Gender: Men's and women's watch (Unisex)
- Movement: Japanese quartz, caliber Seiko 7820
- Functions: Hours, minutes
- Case: Steel (steel back), carrée shape with softened angles
- Dimensions: 29mm wide (31mm with the crown)
- Lug to lug: 35mm
- Thickness: 6.2mm (Crystal included)
- Lug width: 19mm
- Crown: Steel, " d'origine
- Dial: Satin-brushed silver, applied baton hour markers, "Seiko Quartz" signature and Seiko emblem at 6 o'clock, original
- Hands: Steel baton hands (hours and minutes), original
- Crystal: Mineral, very fine condition
- Bracelet: Handmade green crocodile leather, not original
- Buckle: Steel buckle, not original
Condition and warranty
- Overall condition: Beautiful state of preservation. Original silvered dial and Crystal mineral crystal 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 does "Seiko Quartz" (SQ) mean?
"SQ" is the abbreviation for Seiko Quartz, the designation used by Seiko for its quartz watches. Seiko made history by launching the Astron in 1969, the world's first quartz wristwatch, sparking the quartz revolution. This piece belongs to that lineage of precise and elegant Japanese dress watches.
What is caliber Seiko 7820?
The 7820 is a high-end analog quartz movement produced by Seiko between the late 1970s and the 1980s. Renowned for its slimness, it powered ultra-thin dress watches. It displays the hours and minutes and runs on a battery, ensuring outstanding precision and maintenance-free operation.
What are the advantages of a quartz watch?
A quartz watch offers greater accuracy than most mechanical watches (a few seconds' deviation per month) and requires no winding: a battery powers it for several years. It is a reliable, hassle-free solution, ideal for everyday wear.
Is this watch suitable for a man or a woman?
It is a Unisex piece. Its 29mm square case and slim profile allow it to suit both a masculine and a feminine wrist. Its refined silver dial makes it a versatile dress watch, perfect for everyday wear as well as more formal occasions.
Is the bracelet original?
No. The watch is fitted with a handmade green crocodile leather strap, recently installed by us, with a steel Buckle buckle. The crown, however, is original. The strap can be changed according to your preferences; its Lug width is 19mm.
What is the international delivery time?
Dispatch within 48 hours, international delivery within 3 to 5 days, insurance included.
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.
A piece selected by Atelier Victor
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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