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Vintage Seiko Tank 9021-5180 Watch — Steel, White Dial (1984)

Only 1 available


Selling price€370,00

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 with cut corners, 5.5mm thick, a white dial with a light grain, and on the back a Japanese engraving dated August 1985. A Seiko from 1984, delivered with its Atelier Victor invoice serving as a certificate.

A 1984 Seiko Tank 9021-5180, steel with cut corners and engraved caseback

This Seiko 9021-5180 dates from 1984. Its rectangular steel case, with cut corners and a stepped bezel, measures 27.5mm wide, 36mm lug-to-lug and 5.5mm thick: an extra-thin watch profile that slips under a cuff.

The white dial, with a grained finish, features thin baton markers, doubled at 12 o'clock, and a dotted minute track. Two dark baton hands indicate the hours and minutes, and a thin silver-tone centre seconds hand sweeps across the dial. The Seiko Quartz signature is placed below 12 o'clock.

The caseback bears an engraving in Japanese, dated August 1985: a presentation inscription indicating a watch given for twenty-five years of service within a Japanese company. The watch is powered by the Seiko 9021 quartz calibre, made in Japan; the original steel crown sits on the right side.

It is fitted with a handmade black crocodile leather strap, fastened by a steel pin buckle, on an 18mm lug width.

Three points to note

01

Japanese-engraved caseback — A presentation inscription dated August 1985.

02

5.5mm thick — An extra-thin steel rectangle with cut corners.

03

Grained white dial — Fine markers and a silver-tone centre seconds hand.

Why choose a vintage Seiko Tank watch?

This Seiko Tank 9021-5180 combines a 5.5mm steel case with cut corners, a grained white dial and a caseback that retains the trace of its presentation, in August 1985. A dress watch that can be worn every day as well as with a shirt.

Each piece offered by Atelier Victor is checked by our watchmakers before being listed 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 guarantee of authenticity.

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Technical specifications

  • Brand : Seiko
  • Model : Tank steel with cut corners, white dial
  • Reference : 9021-5180
  • Estimated year: 1984
  • Serial number: 4101••
  • Origin: Japan
  • Gender: Men's watch, women's watch (Unisex)
  • Movement: Quartz, calibre Seiko 9021 (Japan)
  • Functions: Hours, minutes, centre seconds
  • Case: Steel (engraved steel caseback), rectangular shape with cut corners
  • Width: 27.5mm (29.5mm including the crown)
  • Lug-to-lug: 36mm
  • Thickness: 5.5mm
  • Lug width: 18mm
  • Crown: Steel, original
  • Dial: White grained, baton markers, original
  • Hands: Baton, silver-tone centre seconds, 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, engraved caseback, 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 is commonly used to refer to a watch with a rectangular case. Seiko did not market this reference under that name: it is its shape that earned it, a steel rectangle with cut corners.

What does the caseback engraving say?
It is written in Japanese and dated August 1985. It indicates a gift for twenty-five years of service, in the name of a Japanese company: in Japan, offering an engraved watch to reward a long career was common practice.

How is this watch dated?
By its serial number, engraved on the caseback, 4101••. At Seiko, the first digit gives the year within the decade, here 4, and the second the month, here 1: the piece dates from January 1984, before it was presented in August 1985.

Is this piece suitable for a slim or larger wrist?
At 27.5mm wide, 36mm Lug-to-lug, and 5.5mm thick, it suits wrists of around 15 to 18cm — a guide, never a rule: everyone wears what they like. It slips under a cuff.

How do delivery and payment work?
The piece is shipped with tracking and insurance by a trusted carrier, to a collection point or home delivery depending on the destination. Delivery is free.

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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