Seiko The Blackdiamond Collection Watch — Gold-Plated Concealed Dial (1993)
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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A dial that disappears at will
This watch Seiko The Blackdiamond Collection, reference 5P30-7030, produced in 1993, can be worn equally well by a man or a woman, with a 34mm gold-plated case whose 6.4mm thickness places it in the dress watch category. Its bezel is wide, guilloché on the surface and edged with a fine fluting along the side. Four faceted black stones are set there at the cardinal points, in a diamond shape.
The distinctive feature of this piece lies elsewhere, and it is uncommon. A rotating disc makes it possible to conceal the dial. In the open position, one sees a golden dial with black Roman numerals, with the signature The Blackdiamond Collection on two lines beneath the twelve o'clock marker. In the closed position, a black disc covers the whole, and only the golden hands remain visible, floating on an entirely dark surface.
It is a so-called mystery watch mechanism, the idea of which goes back to clocks from the early twentieth century. Seiko transposed it here onto a serially produced wristwatch, which remains rare — most brands reserved this type type of device for high jewelry pieces. The watch changes appearance completely depending on the chosen position: legible and classic, or pared down to the point of abstraction.
The 5P30 calibre powering it is a three-hand analogue quartz movement, whose slim architecture allows for this 6.4mm thickness despite the additional disc housed beneath the Crystal. The Blackdiamond Collection belongs to the Japanese production of Seiko and was not distributed in Europe through official channels, which explains why it is seldom encountered on this side of the world.
Three points to note
- Concealable dial — a rotating disc makes the dial disappear and leaves only the hands visible, a rare mechanism on a serially produced wristwatch.
- Bezel set with four black stones — faceted in a diamond shape and arranged at the cardinal points, they give the collection its name.
- Japanese line not distributed in Europe — The Blackdiamond Collection was never circulated through official channels on this side of the world.
Why choose a vintage Seiko watch?
Buying a vintage Seiko watch rather than a new model means gaining access to a leading Japanese manufacture on a controlled budget, with pieces whose construction has proven its durability. Vintage quartz watches from this period are also the easiest to maintain on the pre-owned market: a battery change is enough to set them running again.
This reference holds a special place among men's and women's vintage watches: its concealing mechanism makes it an original watch that few brands have offered in serial production. Its 34mm format and restrained thickness make it equally wearable by both, in a dress watch register.
Like all our pre-owned Seiko watches, this one has been opened and checked by our watchmakers: verification of the calibre and its consistency with the reference, examination of the dial, hands, and case. Every Japanese vintage watch we offer comes with an invoice Atelier Victor serving as a certificate, a one-year guarantee, and guaranteed lifetime authenticity.
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Technical specifications
- Brand: Seiko
- Model: The Blackdiamond Collection
- Reference: 5P30-7030
- Estimated year: 1993
- Origin: Japan
- Gender: Men's and women's watch (Unisex)
- Movement: Japanese quartz, Seiko 5P30 caliber
- Functions: Hours, minutes, seconds, dial obscuring by rotating disc
- Case: Gold-plated, round shape (steel caseback)
- Bezel: Engine-turned gold-plated, set with four faceted black stones (uncertified nature)
- Dimensions: 34mm (34.5mm including the crown)
- Lug to lug: 38mm
- Thickness: 6.4mm
- Lug width: 18mm
- Crown: Golden, fluted, original
- Dial: Golden with black Roman numerals, black obscuring disc, original
- Hands: Golden, tapered baton shape, original
- Crystal: Mineral (condition 4/10, visible scratches)
- Strap: Brown crocodile-style leather, not original
- Buckle: Steel pin buckle, not original
Condition and guarantee
- Overall condition: Good state of preservation for the case and movement. The golden dial is crisp, the Roman numerals and hands are intact, and the obscuring disc functions correctly in both positions. The gold plating shows light signs of wear. The Crystal, however, bears a dense network of scratches across its entire surface, fully visible in our photographs.
- Water resistance: Not guaranteed (vintage watch)
- Authenticity: Lifetime guarantee
- Mechanics: Quartz movement checked, new battery, guaranteed for 1 year
- Included: Atelier Victor invoice, protective case
- Not included: Original box and papers
Frequently asked questions
How does the concealing dial work?
A rotating disc makes it possible to conceal or reveal the dial. In the revealed position, you see the golden dial with Roman numerals; in the concealed position, a black disc covers the entire dial and only the golden hands remain visible, creating a refined mystery effect. It is a mechanism whose concept dates back to the mystery clocks of the early twentieth century, and which very few brands have adapted to a serially produced wristwatch.
Can the Crystal be replaced?
Yes. The Crystal of this watch bears a dense network of scratches that hinders legibility in direct light, as shown in our photographs. On a round case of this size, replacement can be carried out without difficulty by a watchmaker. We chose to leave the original Crystal in place and adjust the price accordingly rather than anticipate a preference that is yours to make.
Are the stones on the bezel real black diamonds?
We cannot state this with certainty. The four faceted black stones set on the bezel have not been the subject of a gemological appraisal, and we refuse to decide without proof, one way or the other. They give the collection its name and create a marked contrast with the gold of the case. The interest of this piece lies above all in its concealment mechanism and its design.
Is a vintage Seiko watch a safe purchase?
It is, provided that authenticity is established and the condition is described without reservation. Our watchmakers systematically open the case to verify the calibre and its consistency with the reference, and inspect the dial, the hands, and all components. Every pre-owned Seiko watch sold by Atelier Victor comes with an invoice serving as a certificate of authenticity, a one-year guarantee, and authenticity guaranteed for life.
Is this piece suitable for a slim or larger wrist?
With a 34mm diameter, 38mm Lug-to-lug, and 6.4mm thickness, it suits wrists from approximately 15 to 19cm. Its very short Lug-to-lug relative to the diameter makes it particularly comfortable on a slim wrist. The Lug width measures 18mm, making 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.
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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