Seiko Hanae Mori 2N20-0070 Watch — Case Reversible (1988)
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 case that flips and two watches in one
This Seiko watch was produced in collaboration with Hanae Mori, a Japanese couturière and the first Asian designer admitted to the Chambre Syndicale de la Haute Couture in Paris. Seiko handled the manufacturing and movement, while Hanae Mori created the design, with the HM monogram appearing on both dials.
Its distinctive feature lies in the case. Round, gold-plated, 30mm, it flips within its middle case to reveal either of its two sides — each with its own dial and its own bezel. This is not a simple dial reversal but a complete rotating module, which explains why the two sides have nothing in common.
The first side features a white lacquered dial with black Roman numerals, framed by a polished bezel with four visible golden screws. The aesthetic is graphic and crisp. The second side takes the exact opposite approach: a black dial with radiating facets, without a single hour marker, surrounded by a wide bezel on which only the Roman numerals XII, III, VI and IX are engraved in the gold. Day and evening on the same watch.
Inside is a Seiko quartz movement, calibre 2N20, with two hands. No date and no seconds hand: nothing to disturb the design of either dial. Maintenance is limited to a battery change by any watchmaker. The movement of this example has been checked and the battery replaced.
Three points to note
- Case reversible with two complete sides — each side has its own dial and bezel, giving two watches in a single case.
- Collaboration between Seiko and Hanae Mori — the manufacturing and movement of a Japanese manufacture under the design of a couturière, signed with the HM monogram.
- Two opposing aesthetics — white lacquer with Roman numerals on one side, black faceted without hour markers on the other.
Why choose a vintage Seiko watch?
Buying a vintage Seiko watch rather than a new model means gaining access to a leading Japanese manufacture at a controlled budget. Vintage quartz watches from this period are also the easiest to maintain on the pre-owned market: a battery change is enough to get them running again.
This piece holds a distinct place among vintage men's and women's watches: the reversible case is a feature that very few brands have offered in serial production, and it makes it as much an original watch as a dress watch. Its 30mm size makes it equally wearable by both.
Like all our pre-owned Seiko watches, this one has been opened and checked by our watchmakers: verification of the calibre, examination of the dials, hands, and case. Each vintage Japanese watch we offer comes with a Atelier Victor invoice serving as a certificate, a one-year guarantee, and guaranteed lifetime authenticity.
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Technical characteristics
- Brand: Seiko
- Model: Hanae Mori, reversible case with two sides
- Reference: 2N20-0070
- Serial number: 8903••
- Year: 1988
- Origin: Japan
- Gender: Men's and women's watch (Unisex)
- Movement: Japanese quartz, caliber Seiko 2N20
- Functions: Hours, minutes, reversible two-sided case
- Case: Gold-plated, reversible round shape (steel back)
- Dimensions: 30mm (34mm including the crown)
- Lug to lug: 42mm
- Thickness: 8.7mm
- Lug width: 17mm
- Crown: Gold-plated, original
- Dial side A: White lacquered, black Roman numerals, HM monogram, original
- Dial side B: Black with radiating faceted finish, no hour markers, golden HM monogram, original
- Bezel side A: Polished gold-plated, four visible screws
- Bezel side B: Gold-plated, engraved Roman numerals XII, III, VI and IX
- Hands: Black (side A), golden (side B), original
- Crystal: Mineral on both sides
- Strap: Black leather, non-original
- Buckle: Golden pin buckle, non-original
Condition and warranty
- Overall condition: Good state of preservation. Both dials are original and in very fine condition: the white lacquer is immaculate, the black faceted dial retains all its radiance, and the monograms and hands are intact. The gold plating, however, shows pronounced wear scratches on both bezels and on the strap attachments, fully visible in our photographs. The Crystal on the black side shows visible scratches.
- Water resistance: Not guaranteed (vintage watch). The reversible mechanism puts stress on the case gaskets; we recommend avoiding all contact with water.
- 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 reversible case work?
The case tilts within its frame to present one or the other of its two sides. Each side has its own dial and its own bezel: it is therefore not a simple reversal of the dial, but a complete module that pivots. The mechanism should be handled gently, as with any watch with a movable case, and it is preferable to do so with the watch removed from the wrist.
Does the watch have one or two movements?
Only one. The two sides do not tell the time at the same time: it is the dial turned upward that is active. The case houses a single quartz movement Seiko, which explains the slimness of the whole and the simplicity of its maintenance.
What is a Seiko Hanae Mori?
This is a Seiko watch created in collaboration with Hanae Mori, a Japanese couturière and the first Asian designer admitted to the Chambre Syndicale de la Haute Couture in Paris. Seiko handled its manufacturing and movement, while the couturière designed it. The HM monogram appears on both dials.
Is this watch water-resistant?
No, and we recommend being particularly cautious with this reference. Water resistance is never guaranteed on a vintage watch, and the reversible mechanism puts more strain on the case gaskets than a fixed construction. Avoid all contact with water, including when washing your hands.
What wrist size is this watch suitable for?
With a 30mm case and 42mm Lug-to-lug, it fits wrists from approximately 15 to 18.5cm. It is a Unisex piece: the white Roman numeral dial for daytime, the minimalist black dial for evening. The Lug width measures 17mm, 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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