Patek Philippe 3940: identify the watch before judging the price.
The Maison Montres 3940 review starts with exact identity, then tests condition, originality, documents, service history and like-for-like completed sales. Verify the reference, case, movement, dial and case-back configuration before judging a price.
Patek Philippe introduced reference 3940 in 1985. Its 36 mm case, self-winding caliber 240 Q and three-subdial perpetual-calendar display form the baseline. They do not authenticate or value a specific watch.
Decision limit: this is an educational research guide. It is not a remote authentication, condition report, valuation or offer. A watch-specific physical expert inspection is required before a purchase, service or sale decision.
Start with facts supported by Patek Philippe.
| Feature | Evidence-bounded baseline | What still needs inspection |
|---|---|---|
| Introduction | Patek Philippe says reference 3940 debuted in 1985 and replaced reference 3450. | Confirm the production and sale dates for the individual watch. |
| Case size | Official historical material states a 36 mm diameter. | Measure the case and assess its geometry, wear and prior refinishing. |
| Movement | The official reference history identifies self-winding caliber 240 Q with an integrated 22K-gold micro-rotor. | Confirm the movement identity, number, condition and consistency with the watch file. |
| Display | Day and 24-hour display at 9; month and leap year at 3; date and moon phase at 6. | Check dial details and calendar operation against the exact configuration and instructions. |
| Successor | Patek Philippe introduced the 37.2 mm reference 5140 in 2006 as the larger successor. | Do not use successor specifications to describe a 3940. |
Record the complete reference exactly as shown in the evidence, including any suffix. Also record the case number, movement number, metal, dial language and layout, case-back type, buckle or clasp and accompanying parts. Keep complete serial numbers out of public material.
The baseline above comes from Patek Philippe's own magazine history and its March 2006 reference 5140 press release. Auction catalogues can help compare individual watches, but catalogue claims should be checked against primary records and the physical watch.
Treat “series” as a comparison tool, not a factory certificate.
Collectors and auction houses group 3940 watches by changes in dials, movement-number ranges and case backs. The terminology is not fully consistent. For example, a Phillips catalogue may call the 25 Beyer watches “First Series” in a title while another Phillips description treats them as a pre-series group before standard production. Christie's commonly describes three production series plus early examples.
That difference does not make either individual watch correct or incorrect. It means a series label alone is too weak for identification or valuation. State which catalogue convention is being used, then describe the observed dial, subdials, indices, hands, movement, case back and numbers.
Do not transfer the specifications or rarity claim of one documented example to another watch with a similar appearance. Retailer signatures, unusual dials, metals, languages and accompanying records require specific evidence.
Assess condition by component, not one marketing grade.
Case: inspect dimensions, edges, lug shape, bezel, hallmarks, surface finish, dents, corrosion and evidence of polishing or repair. A polished case is not automatically unacceptable, but the extent and quality should be disclosed.
Dial and hands: inspect printing, colour, surfaces, subdials, indices, hands and signs of cleaning, moisture, repair or replacement. Compare them with credible examples that match the watch's date and configuration. Appearance alone cannot establish originality.
Movement and functions: a qualified specialist should inspect movement identity and condition, winding, timekeeping, calendar changeover, correctors and moon-phase operation. Do not operate correctors without the correct instructions. A current water-resistance test, when appropriate, matters more than a historical specification.
Accessories: inspect the buckle or clasp, case backs, setting pin, box and papers separately. “Full set” is not a standardised evidence term; list every item and whether it is original to the watch, period-correct, later or uncertain.
Build conclusions from several independent records.
Start with direct observation and photographs. Reconcile the case, dial, movement and serial information with the Certificate of Origin, archive information, service papers, invoices and previous catalogues. Record gaps and conflicts instead of forcing a clean story.
Patek Philippe describes its Extract from the Archives as a partial transcript of its records. The official ordering page says it reports manufacturing history, relevant recorded features and date of sale. The maker's FAQ distinguishes it from the original Certificate of Origin, which was delivered with the new watch and contains the movement, case and reference numbers.
An Extract is valuable evidence, but the historic record does not by itself prove the condition or complete originality of every component now fitted. Likewise, a Certificate of Origin does not show every event after first delivery. A watch-specific inspection must state the evidence reviewed and the limits of the conclusion.
Check the seller, ownership and title route as well as the object. If a lost-and-stolen database search is used, record its date and scope. A clear result is not a substitute for seller, ownership or authenticity checks.
Separate mechanical need from cosmetic choice.
Ask for every available service estimate and invoice. Record the provider, date, stated work, parts changed, polishing or case work, tests and guarantee. Missing history is a known gap, not proof that a watch was never serviced.
Patek Philippe's current general guidance recommends service every eight to ten years through its official service network. The maker also says its service process inspects the movement and external parts, may replace movement components when required and polishes the case or bracelet only if requested by the customer.
Before service, photograph the watch and approve the scope in writing. Ask which work is required for function and which is optional. Record decisions on polishing, case repair, dial and hands, replacement components and returned parts. Terms and technical options depend on the watch and provider.
A recent service can support function and documentation, but it does not erase condition or originality questions. A long interval since service can increase uncertainty, but it does not by itself establish a defect.
Use closed results as examples, not a universal price range.
| Sale date | Watch as catalogued | Published result | Comparison limit |
|---|---|---|---|
| 4 Sep 2025 | 2002 ref. 3940J-014, yellow gold, Certificate of Origin, additional case back, box and listed accessories | CHF53,340 “Sold For” | A later-production example; catalogue condition and transaction terms require review. |
| 8–9 Nov 2025 | 1985 ref. 3940, yellow gold, early “First Series” dial, archive extract and box | CHF114,300 “Sold For” | An early standard-production configuration, not directly comparable with a later 3940J-014. |
| 13–14 Jun 2026 | 1985 ref. 3940, Beyer number 20 of 25, champagne dial, Certificate of Origin, archive extract and extensive listed set | USD965,200 “Sold For” | Exceptional early retailer-linked watch. It is an outlier, not an ordinary 3940 price anchor. |
Maison Montres comparison method: these are closed lots on Phillips pages reviewed on 14 September 2026. Figures reproduce the auction house's “Sold For” field in the published currency. Maison Montres has not converted currencies, adjusted for inflation, reconstructed taxes or fees, or independently verified each condition description.
The results do not define today's dealer bid, private-sale value, auction estimate, replacement value or seller's net proceeds. Two watches carrying reference 3940 can differ materially by production period, metal, dial, retailer association, condition, service, records and accessories.
No live lot, unsold lot or dealer asking price is treated here as a completed sale. A current purpose-specific valuation needs a defined date, market, currency, configuration and condition.
Approve the candidate, counterparty and transaction separately.
- Candidate: compare the exact watch with a written reference, condition, originality, document and service brief.
- Counterparty: verify identity, authority to sell, ownership evidence, disclosures and return or inspection terms.
- Inspection: use an appropriately qualified watch specialist and define what the report will and will not conclude.
- Price: compare relevant completed transactions and current executable evidence; model tax, currency, service, transport and insurance separately.
- Handover: verify payment instructions, custody, transit insurance, condition at transfer and delivery documents.
Maison Montres publishes no Patek Philippe 3940 stock on this page and makes no availability claim. A sourcing engagement starts with a written brief; any candidate must be assessed on its own evidence.
Choose the route after the watch file is ready.
| Route | Useful when | Terms to compare |
|---|---|---|
| Specialist dealer bid | The owner values a firm decision point and controlled timing. | Offer validity, deductions, inspection, payment, collection and return. |
| Public auction | The exact configuration has credible competitive demand and public exposure is acceptable. | Estimate, reserve, seller fee, marketing, withdrawal, unsold terms, payment and release. |
| Private brokerage | The owner values a controlled presentation and buyer process. | Agency, exclusivity, fee, authority, disclosures, proposals, diligence and settlement. |
Prepare current photographs, exact identity, condition and service notes, document list, location, ownership evidence and known limitations before requesting terms. Compare expected net proceeds and execution risk, not only a public estimate or achieved gross result.
The Maison Montres Patek Philippe sale guide explains the information needed to discuss a seller-side scope. No mandate, marketing authority or purchase offer is created by this page.
Dated evidence behind this guide.
Sources were checked on 14 September 2026. Manufacturer sources support reference history, document definitions and current service guidance. Auction sources support individual catalogued examples and published results. External citations do not imply endorsement, partnership or affiliation.
- Patek Philippe Magazine — “Forecasting the Future”: 1985 debut, 36 mm case, caliber 240 Q and dial architecture.
- Patek Philippe — March 2006 reference 5140 press release: predecessor dimensions, display layout and successor context.
- Patek Philippe — Ordering an Extract and Extract FAQ: archive scope, eligibility and distinction from the Certificate of Origin.
- Patek Philippe — Watch Care Recommendations and Steps of Servicing: current general interval and documented service process.
- Christie's — 1992 reference 3940R catalogue record: one commonly used three-series convention.
- Phillips — lot 12, Geneva Sessions Fall 2025; lot 99, Decade One; and lot 25, New York XIV: catalogued facts and closed “Sold For” results.
- Maison Montres rare-watch research methodology: the source hierarchy and comparable-sale rules applied here.
- Maison Montres editorial standards: limitations and correction process.
Source pages may change. Before relying on a figure or process, open the linked record and confirm its current content. Report a factual issue through the Maison Montres contact page.
Patek Philippe 3940, answered carefully.
These answers define a review process; they do not authenticate or value a specific watch.
How do I identify a Patek Philippe 3940?
Start with the reference, case and movement numbers, then reconcile the case metal, dial, movement, case back and documents. Official Patek Philippe material describes the 3940 as a 36 mm self-winding perpetual calendar using caliber 240 Q. A physical expert inspection is still required for a specific watch.
Is the Patek Philippe 3940 a 36 mm watch?
Yes. Patek Philippe's historical material describes reference 3940 as 36 mm. Published auction records for individual examples also report 36 mm, but the dimensions and identity of a specific watch should still be checked.
What do the Patek Philippe 3940 series labels mean?
Series labels are collector and auction-catalogue conventions used to group dial, movement and case-back changes. The labels are not applied consistently across every catalogue. Do not identify or value a watch from a series name alone; verify the actual components, numbers and records.
Which documents matter for a Patek Philippe 3940?
Important records can include the original Certificate of Origin, an eligible Extract from the Archives, purchase and ownership evidence, service invoices, condition photographs and prior inspection reports. Each document has a limited purpose and does not by itself establish every aspect of authenticity, originality, title or condition.
What have recent Patek Philippe 3940 examples sold for?
Three Phillips results illustrate the need for exact comparison: CHF53,340 for a 2002 reference 3940J-014 on 4 September 2025, CHF114,300 for an early 1985 example in November 2025 and USD965,200 for one of the first 25 Beyer examples in June 2026. These are reported auction results, not a valuation range, and the Beyer result is an exceptional outlier.
Does Maison Montres have a Patek Philippe 3940 in stock?
This guide does not publish stock or claim that a Patek Philippe 3940 is available. A sourcing discussion begins with a written brief and independent review of any candidate. A sale discussion begins with the owner's watch file and an agreed inspection and engagement scope.