Vintage Seiko 5Y23-8140 Watch — Two-tone, Roman Numerals (1988)
Only 1 available
Shipping from Europe — taxes and customs duties payable by the buyer outside the EU
Authenticity guaranteed for life
Movement guaranteed for 1 year
Free insured shipping
Photo taken on a 16.5 cm wrist
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Atelier Note
A gold-plated octagonal bezel on a steel case, a white dial with Roman numerals, and Sunday marked in red. A Seiko from 1988, on its original two-tone bracelet. Checked, delivered with its Atelier Victor invoice serving as a certificate.
A Seiko from 1988, steel and gold-plated, white dial with Roman numerals
The steel case measures 38.5mm in diameter and 8mm thick. It has a gold-plated octagonal bezel with a brushed finish, framing the dial; the gold-plated crown echoes this bezel. The bracelet is attached on a 24mm Lug width, in continuity with the case, with 41.5mm Lug-to-lug. The caseback is steel.
The white dial has twelve black Roman numerals and a minute track punctuated with gold-tone dots. The hour and minute hands are black, the centre seconds hand gold-tone; the Seiko Quartz signature occupies the top of the dial and the SQ logo the bottom. Dial and hands are original.
The window at 3 o'clock displays the day and date, with Sunday written in red. The watch is powered by the Seiko 5Y23 calibre, a day-date quartz from the late 1980s; the serial number engraved on the caseback dates production to November 1988.
The watch has kept its original bracelet, steel with gold-plated centre links, and its signed Buckle folding clasp signed Seiko and SQ; it adjusts up to a wrist of around 17.5cm. At 8mm thick, it slips under a cuff.
Three points to note
01
Gold-plated octagonal bezel — A faceted outline on an 8mm steel case.
02
Roman numerals — A white dial, black hands and Sunday in red.
03
Original bracelet — The steel and gold-plated bracelet, with its signed Buckle folding clasp by Seiko.
Why choose a vintage Seiko watch?
This 5Y23-8140 reference brings together a gold-plated octagonal bezel, a white dial with Roman numerals, a day-date window and its original two-tone bracelet. A 1988 watch, to wear every day as well as in the evening.
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 authenticity guarantee.
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Technical specifications
- Brand: Seiko
- Model: Quartz day and date, Roman numerals
- Reference: 5Y23-8140
- Estimated year: November 1988
- Serial number: 8N28••
- Origin: Japan
- Gender: Men's watch, women's watch (Unisex)
- Movement: Japanese quartz, Seiko caliber 5Y23
- Functions: Hours, minutes, centre seconds, day and date
- Case: Steel, gold-plated octagonal bezel (steel back)
- Diameter: 38.5mm (40.5mm including the crown)
- Lug-to-lug: 41.5mm
- Thickness: 8mm
- Lug width: 24mm
- Crown: Gold-plated, original
- Dial: White, black Roman numerals, SQ logo, original
- Hands: Black, gold-tone centre seconds hand, original
- Crystal: Mineral (condition 8/10)
- Bracelet: Steel with gold-plated centre links, original, adjustable up to 17.5cm
- Buckle: Signed Seiko steel folding clasp, original
Condition and guarantee
- Overall condition: Good overall condition with surface scratches from wear, original dial, hands and bracelet, Crystal 8/10
- Water resistance: Not guaranteed (vintage watch)
- Authenticity: Lifetime guarantee
- Mechanics: Checked and functional quartz movement, 1-year guarantee
- Included: Atelier Victor invoice serving as a certificate of authenticity, protective case
- Not included: Original box and papers
Frequently asked questions
What is the Seiko 5Y23 caliber?
A three-hand analog quartz movement by Seiko, with day and date, whose technical documentation dates from 1988. It runs on a 371 battery, which can be replaced by any watchmaker.
How is this watch dated?
By its serial number, engraved on the caseback. At Seiko, the first digit gives the year within the decade and the following sign gives the month, N for November. As the 5Y23 caliber dates from the late 1980s, 8N•••• corresponds to November 1988.
Why is Sunday in red?
On this watch's day disc, Sunday is written in red. The indication can be read at a glance in the window at 3 o'clock.
Is the bracelet original and what size is it?
Yes. The steel bracelet with gold-plated centre links and its signed Seiko folding Buckle are those of the watch; it adjusts up to a wrist of about 17.5cm.
How do delivery and payment work?
The piece is shipped with tracking and insurance by a trusted carrier, to a collection point or home address 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, inspected, 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 you can make your choice with complete peace of mind.
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