Vintage Piaget Protocole Watch 91542 — Blue Starry Dial (1970s)
Only 1 available
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Shipping from Dubai — taxes and customs duties are the buyer's responsibility outside the UAE
Lifetime authenticity guarantee
Movement guaranteed for 1 year
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Photo taken on a 17.5 cm wrist
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Atelier Note
A varnish that fifty years have turned into a starry sky — no other example bears this one.
A midnight-blue dial strewn with stars across four and a half millimeters of gold
This Piaget Protocole watch, reference 91542, produced in the 1970s, stands out first and foremost for its dial. Against a midnight-blue sunburst satin-finished background, a constellation of light dots is spread across the entire surface, denser in the upper half. This appearance arose from the varnish itself over the last fifty years: no dial ages the same way twice, and no other example displays the same effect. The result evokes a starry sky, and that is what gives this piece its character.
The dial bears neither hour markers nor numerals. Only the PIAGET signature beneath twelve, the word SWISS at the bottom, and the gold dauphine hands. Time is read solely by the position of the hands on an entirely bare surface — a deliberate choice that few houses embrace, and which here leaves all the space to the blue and its light dots.
The case is rectangular, 25mm, in 18-carat yellow gold, with all four corners cut on a bevel. Its total thickness is 4.5mm, including the case. This slimness is due to the 9P2 calibre, which measures 2.15 millimeters and comprises 86 components: it is the evolution of the 9P launched in 1957, presented at its release as the thinnest hand-wound mechanical movement in the world. It is this movement that made Piaget the benchmark for the ultra-thin.
The crown is set with a dark stone cabochon, a design detail that Piaget applied to its dress lines. The 18-carat yellow gold signed Piaget Buckle — an element these watches often lose over the course of strap changes, and one that is difficult to replace.
Three points to note
01
Midnight-blue dial strewn with stars — light speckling born of time, giving this piece an appearance that no other example reproduces.
02
4.5mm total thickness — including the solid-gold case, a profile that current production practically no longer achieves in a mechanical watch.
03
18k gold Buckle signed Piaget — often lost over the course of strap changes, it is present here and original.
Why choose a vintage Piaget watch?
This pre-owned Piaget watch holds a distinct place among men's and women's vintage watches: its 25mm format and extreme slimness make it a vintage dress watch suitable to be worn equally by both, in a strictly formal register. It is the type type of piece that slips under a cuff without ever making its presence felt.
Like all our pre-owned luxury watches, this one has been opened and inspected by our watchmakers: verification of the caliber and its consistency with the reference, serial number check, examination of the dial, hands and case. Every vintage gold 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: Piaget
- Model: Protocole
- Reference: 91542
- Serial number: 3477••
- Estimated year: 1970s
- Origin: Switzerland
- Gender: Men's and women's watch (Unisex)
- Movement: Hand-wound mechanical, Piaget caliber 9P2 (2.15mm thick)
- Functions: Hours, minutes
- Case: 18-carat yellow gold, rectangular shape with cut corners
- Width: 25mm (27.5mm with crown)
- Lug to lug: 27.5mm
- Thickness: 4.5mm
- Lug width: 17mm
- Crown: Gold, dark stone cabochon, original
- Dial: Midnight blue with sunburst satin finish, speckled with light points, no hour markers, original
- Hands: Gold, dauphine shape, original
- Crystal: Mineral, original (condition 8/10)
- Strap: Black crocodile-pattern leather, non-original
- Buckle: 18-carat yellow gold pin buckle, signed Piaget, original
Condition and guarantee
- General condition: The dial is original and has never been restored. Its blue lacquer has evolved over time and shows light speckling spread across the entire surface, denser in the upper half and on the right side, fully visible in our photographs. The sunburst satin finish remains visible, and the dauphine hands and signature are intact. The 18-carat gold case bears pronounced signs of wear on the bezel and sides, gold being a soft metal. The Crystal is in good condition (8/10).
- Water resistance: Not guaranteed (vintage watch)
- Authenticity: Lifetime guarantee
- Mechanics: Serviced movement, guaranteed for 1 year
- Included: Atelier Victor invoice Atelier Victor, protective case
- Not included: Original box and papers
Frequently asked questions
Where does the dial's speckled appearance come from?
The lacquer itself. On lacquered dials from the 1970s, the lacquer layer lifts in places over the decades and reveals light spots. The manufacturing has nothing to do with it: time produced it, and each dial evolves differently, so that no two examples are identical. Against this midnight blue background, the effect evokes a starry sky. It is a patina born of time: the dial is authentic, never restored, and fifty years have given it an appearance that no other example shares.
What is the 9P2 caliber?
It is a hand-wound mechanical movement measuring 2.15 millimeters thick and comprising 86 components. It derives from the 9P launched by Piaget in 1957, which measured 2mm and was presented as the thinnest hand-wound mechanical movement in the world. The 9P2 gains one and a half tenths of a millimeter for greater robustness and introduces a micrometric screw for rate adjustment. It is this caliber that established Piaget as a benchmark in ultra-thin watchmaking.
What is the Protocole line?
Protocole refers to one of Piaget's dress lines, characterized by a rectangular case with cut corners in precious metal and by the house's ultra-thin calibers. These watches were produced over several decades, with highly varied dials — hardstone, engine-turned gold, colored lacquer — on the same case architecture.
How should an 18-carat gold case be cared for?
18-carat gold is a soft metal that scratches easily, which explains the marks this case bears after fifty years. A soft, dry cloth is sufficient for routine care. Polishing is possible with a watchmaker, but it removes material and gradually softens the sharp edges of the cut corners, which define the design of this reference. We have left the piece in its current condition.
Is this piece suitable for a slim or larger wrist?
At 25mm wide, 27.5mm Lug-to-lug, and 4.5mm thick, it suits wrists of approximately 15 to 18cm — a guide, never a rule: everyone wears what they like. Its compact format and exceptional thinness place it firmly in the dress category, equally wearable by a man or a woman. 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.
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, 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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