Seiko Lucent 5E21-5C10 Tank Steel — Gold Roman Numerals Crystal Sapphire (1996)
Lifetime authenticity guarantee
Movement checked & guaranteed for 1 year
International shipping
Photo taken on a 17.5 cm wrist
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Atelier Note
A dial assembled like a mat: white at the center, a grained silver frame, gold Roman numerals set upon it — beneath a Crystal sapphire crystal that, in 1996, was reserved for far more costly watches.
A 1996 Lucent tank, with a dial arranged like a mat
This Seiko watch belongs to the Lucent line, which Seiko produced in the 1990s for its Japanese market around a singular idea: paired watches, the same design rendered in a men's size and a women's size, in the spirit of the European dress codes then highly sought-after in Japan. A line that remained confidential, never distributed in Europe, it offers dress watches with finishing above what their discretion suggests. This 5E21-5C10 reference is dated September 1996.
The dial is constructed like a framer's mat: a central white rectangle, bearing the Seiko and Lucent signatures, set within a grained silver frame — a finely granulated surface across which the gold Roman numerals run. The gold hands, as fine as pen strokes, cross both levels with the seconds hand. This interplay of frames within the frame gives the small dial an unexpected depth.
The tank polished steel case — 24.5mm wide, of the type that watchmaking, since the Tank of Cartier, commonly calls by this name — envelops the dial with its curved lugs, which descend toward the strap without interruption. The golden crown answers the Roman numerals, the only touch of gold on the steel. And the Crystal sapphire crystal, scratch-resistant in normal use, was at the time a rarity in this segment.
The movement is a Seiko quartz caliber 5E21, three-hand, checked. This watch was produced for the Japanese market — what collectors refer to as JDM, Japanese Domestic Market — and it is fitted on a black lizard-pattern leather strap with a Buckle steel pin buckle, both later.
Three points to note
01
Mat-style dial — a white rectangle set within a grained silver frame, gold Roman numerals and hands.
02
Crystal sapphire crystal — scratch-resistant in normal use, a rarity in this segment in 1996, in very fine condition.
03
Lucent line, never seen in Europe — paired watches from 1990s Japan, which remained confidential.
Why choose a vintage Seiko Lucent?
This vintage Seiko watch holds a precise place among vintage men's and women's watches : its 24.5mm by 33.6mm tank case Lug-to-lug is the quintessential compact dress format, conceived by Seiko to be worn equally by either sex — that is the very principle of the line. A vintage dress watch with a sapphire Crystal, at this level of discretion, is found nowhere outside JDM lines.
Like all our vintage quartz watches, this one has been opened and checked by our partner watchmakers: movement verification, examination of the dial, hands and case. Each vintage watch we offer comes with an Atelier Victor invoice Atelier Victor serving as a certificate, a one-year guarantee, and lifetime-guaranteed authenticity.
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Technical specifications
- Brand: Seiko
- Model: Lucent, tank
- Reference: 5E21-5C10
- Serial number: 6905••
- Year: 1996 (September)
- Origin: Japan (domestic market)
- Gender: Men's and women's watch (Unisex)
- Movement: Quartz Seiko, calibre 5E21
- Functions: Hours, minutes, central seconds
- Case: Polished steel, steel back, tank shape with curved lugs
- Width: 24.5mm (26.5mm with crown)
- Lug to lug: 33.6mm
- Thickness: 6.75mm
- Lug width: 17mm
- Crown: Golden, original
- Dial: White rectangle in a grained silver frame, gold Roman numerals, original
- Hands: Gold, fine seconds hand, original
- Crystal: Sapphire (condition 9/10)
- Strap: Black lizard leather, non-original
- Buckle: Steel pin buckle, non-original
Condition and guarantee
- Overall condition: Good state of preservation. Clean dial, grained frame and Roman numerals without alteration, intact gold hands, sapphire Crystal in very fine condition. The polished case shows fine signs of wear on the bezel and sides, visible in our photographs.
- Water resistance: Not guaranteed (vintage watch)
- Authenticity: Lifetime guarantee
- Mechanics: Checked quartz movement, guaranteed for 1 year
- Included: Atelier Victor invoice Atelier Victor
- Not included: Original box and papers
Frequently asked questions
What is the Seiko Lucent line?
It is a dress line that Seiko produced in the 1990s for the Japanese market, built around an idea that was then very much in vogue in Japan: paired watches — the same design made in a men's size and a women's size, to be worn by two people. Inspired by European dress codes, the line remained confidential and was never distributed in Europe: Lucent watches circulate very little, and almost exclusively from Japan.
What is meant by a tank watch?
The name comes from Cartier: the Tank, designed by Louis Cartier in 1917, whose vertical brancards evoked the tracks of the first battle tanks. The design was so successful that the word entered the common language of watchmaking to refer to any rectangular dress watch, worn lengthwise on the wrist — across all brands. This Seiko is a Japanese interpretation of it, with curved lugs that embrace the strap.
What is the advantage of a sapphire crystal?
Synthetic sapphire is, after diamond, one of the hardest materials there is: it does not scratch in everyday use, whereas a mineral crystal becomes marked over the years. Finding one on a Japanese dress watch from 1996 is uncommon — at the time, it was a feature of far more expensive watches. This one is in very fine condition, and it will remain so.
Is quartz reliable on a watch from this period?
Yes. Seiko calibres from the 1990s are robust and easy to maintain: the battery is changed every two to three years by a watchmaker, with no periodic servicing as on a mechanical movement. This one has been checked and is guaranteed for one year.
Is this piece suitable for a slim or larger wrist?
At 24.5mm wide, 33.6mm lug-to-lug and 6.75mm thick, it suits wrists of around 14 to 17cm — a guideline, never a rule: everyone wears what they like, and the Lucent line was designed precisely for both. The lug width measures 17mm, which makes it easy to change the strap.
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.
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)
- 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 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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