Vintage Seiko Tank Watch 7820-5130 — Steel, Circle Dial (1978)
Only 1 available
Shipping from Dubai — taxes and customs duties are the buyer's responsibility outside the UAE
Lifetime authenticity guarantee
Movement guaranteed for 1 year
Free insured shipping
Photo taken on a 17.5 cm wrist
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Atelier Note
A steel rectangle 6.3mm thick, a midnight blue dial covered with interlaced circles, silver-toned applied markers. A Seiko from 1978 on black crocodile leather, delivered with its Atelier Victor invoice serving as a certificate.
A Seiko Tank 7820-5130 from 1978, steel and midnight blue dial with circles
This Seiko 7820-5130 dates from 1978. Its rectangular steel case, with straight polished sides, measures 28mm wide, 34mm lug-to-lug and 6.3mm thick. Its 22mm Lug width gives it a broad presence on the wrist.
The midnight blue dial is covered with a pattern of interlaced circles, which only fully appears under the light: from a distance, it reads almost black. It features silver-toned applied baton markers, doubled at 12 o'clock, and two silver-toned baton hands for the hours and minutes, with no seconds hand. The Seiko Quartz signature is placed below 12 o'clock.
The watch is powered by the Seiko 7820 calibre, quartz, made in Japan. The original steel crown is set into the right side. The mineral Crystal is noted 9/10.
It is fitted with a handmade black crocodile leather strap, fastened with a steel pin buckle.
Three points to note
01
Dial with interlaced circles — A midnight blue that reveals itself under the light.
02
22mm Lug width — A steel rectangle with a broad presence.
03
February 1978 — A date readable in the serial number on the caseback.
Why choose a vintage Seiko Tank watch?
This Seiko Tank 7820-5130 combines a 6.3mm rectangular steel case, a midnight blue dial with a circle pattern, and a black crocodile leather strap. A dress watch from 1978, to wear every day as well as with a shirt.
Each piece offered by Atelier Victor is checked by our watchmakers before being put online: movement tested, case and dial examined. It is delivered with the Atelier Victor invoice serving as a certificate, a 1-year mechanical guarantee on the movement and a lifetime authenticity guarantee.
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Technical specifications
- Brand : Seiko
- Model : Tank steel, blue dial with circles
- Reference : 7820-5130
- Estimated year : 1978
- Serial number : 8216••
- Origin : Japan
- Gender: Men's watch, women's watch (Unisex)
- Movement: Quartz, calibre Seiko 7820 (Japan)
- Functions: Hours, minutes
- Case: Steel (steel caseback), rectangular shape
- Width: 28mm (29.5mm including the crown)
- Lug-to-lug: 34mm
- Thickness: 6.3mm
- Lug width: 22mm
- Crown: Steel, original
- Dial: Midnight blue with interlaced circle pattern, applied silver-tone baton markers, original
- Hands: Silver-tone baton hands, original
- Crystal: Mineral (condition 9/10)
- Strap: Black crocodile leather, handmade, not original
- Buckle: Steel pin buckle, not original
Condition and guarantee
- Overall condition: Very good overall condition, original dial and hands, Crystal 9/10
- Water resistance: Not guaranteed (vintage watch)
- Authenticity: Lifetime guarantee
- Mechanics: Movement checked and functional, 1-year guarantee
- Included: Atelier Victor invoice serving as a certificate of authenticity, protective case
- Not included: Original box and papers
Frequently asked questions
Why is it referred to as a Tank watch?
The term conventionally refers to a watch with a rectangular case. Seiko did not market this reference under that name: it owes it to its shape, a steel rectangle with straight sides.
How is this watch dated?
By its serial number, engraved on the caseback, 8216••. At Seiko, the first digit gives the year within the decade, here 8, and the second the month, here 2: the piece dates from February 1978.
How should reference 7820-5130 be read?
At Seiko, the first four digits designate the calibre, here the quartz 7820, and the next four the case. The reference is engraved on the caseback, next to the serial number.
Is this piece suitable for a slim or larger wrist?
With a width of 28mm, 34mm Lug-to-lug and a thickness of 6.3mm, it suits wrists of around 15 to 18cm — a guide, never a rule: everyone wears what they like. Its Lug width of 22mm gives it presence on the wrist.
How do delivery and payment work?
The piece is shipped with tracking and insurance by a trusted carrier, to a collection point or to your home depending on the destination. Delivery is free.
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.
Free delivery
Delivery is free on all our pieces internationally. Dispatch within 48 to 72 business hours by DHL Express, Emirates Post, EMS or an equivalent carrier depending on the destination, delivery within 2 to 14 business days. Each shipment is insured and delivered against signature.
- 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
Collection in Dubai
In-person handover by appointment in Downtown Dubai. Make an appointment.
Taxes and customs
The shipping origin is indicated on each product page. If the delivery country differs from the shipping country, customs duties and taxes may apply upon receipt and are payable by the buyer. Customs inspections may in rare cases extend the delivery time.
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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