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Two Known in Steel: The Patek Philippe Ref. 1436 That Could Reach CHF 4M at Phillips Geneva

Patek Philippe Ref. 1436 stainless steel split-seconds chronograph, 1945 — the top lot at Phillips Geneva Watch Auction XXIV, estimated CHF 2,000,000–4,000,000

Watch Auctions 2026 · Phillips Geneva, 7–8 November

TL;DR

  • The Patek Philippe Ref. 1436 at Phillips Geneva is the top lot of the entire autumn auction season — CHF 2,000,000–4,000,000 (approx. USD $2.45M–$4.9M / SGD $3.3M–$6.6M, November 2026).
  • One of only two known examples in stainless steel with its original case and dial intact — a 1945 production lot confirmed by Patek Philippe Archive Extract.
  • A split-seconds (rattrapante) chronograph at the apex of its era, appearing for the first time at public auction.
  • Bidding opens Saturday, 7 November 2026 at Hotel President, Geneva; online bidding is available via phillips.com.

Stainless steel was almost beneath Patek Philippe in 1945. The maison made its dress complications — minute repeaters, perpetual calendars, split-seconds chronographs — in yellow gold or pink gold, materials that matched the weight of the mechanism inside. Steel cases were for utility: dive tools, field watches, the occasional sporty reference sold to a market that had yet to fully grasp what a steel Patek could become worth eight decades later.

Lot 95 at Phillips Geneva Watch Auction XXIV is the direct product of that oversight. A Ref. 1436 split-seconds chronograph, made in stainless steel in 1945 and sold — per the Patek Philippe Archive Extract — in 1949. It is, according to Phillips, one of only two known examples in steel with both the original case and the original dial still intact. The other is in a private collection and has not surfaced at public auction. For Geneva week — which runs 6–9 November across four houses — this is the single most expensive lot on any table.

The Ref. 1436: A Brief Biography

The 1436 was Patek Philippe’s flagship chronograph reference from the late 1930s into the mid-1950s. It is built on a Valjoux rattrapante ébauche, extensively re-finished and adjusted to Patek’s standards. The result is a movement with a split-seconds complication: two seconds hands overlap at rest; pressing the upper pusher stops one while the other continues running; press it again and the stopped hand snaps forward to rejoin its partner — rattrapante, French for “catching up.” The mechanism demands extreme precision in the column wheel and the spring-loaded clamps that govern the split. Patek’s finisseurs spent considerable time on each one.

The 1436 was made in modest numbers across its production run and the great majority were cased in yellow or pink gold. Steel examples exist, but they are deeply scarce. The conventional explanation is commercial: steel watches retailed for less, and Patek’s customers for a rattrapante wanted something appropriate to a signing table. A steel rattrapante was a curiosity. Whether this watch’s steel case was a special commission or simply an anomaly in production records, the Archive Extract does not say. What it confirms is 1945 manufacture and 1949 retailing — a four-year gap that may indicate time in stock or a secondary transaction whose paper trail has not survived.

Why “Original Case and Dial” Are the Six Words That Matter

Vintage Patek Philippe chronographs are subject to a particular form of collector scrutiny: the case. Over decades, cases crack at the lugs, develop subsurface oxidation, or simply wear thin enough that a previous owner had a new one made — sometimes by Patek itself under its service programme. A replacement case is not a catastrophe, but it substantially reduces value. The dial is equally consequential: refinished, retouched, or replaced dials are common in pre-1960 Pateks, and a virgin dial with original printing is worth disproportionately more than an otherwise similar replacement.

For Lot 95, Phillips states both case and dial are original. The movement has presumably been serviced over 81 years, but the case metal has not been replaced and the dial has not been redone. In a reference where only two such examples are known to exist in this condition, that combination is the basis of the estimate — and the reason it is not simply listed beside the other important lots but placed at the top of the sale.

Specs

SpecificationDetail
Reference1436
Case materialStainless steel
Case diameterApproximately 35 mm
Movement typeManual-wind split-seconds (rattrapante) chronograph
Calibre baseValjoux rattrapante ébauche, Patek-finished and adjusted
FunctionsSplit-seconds chronograph, 30-minute register, subsidiary seconds
Water resistanceNot rated (vintage construction)
Year produced1945
Year retailed1949 (per Patek Philippe Archive Extract)
Low estimateCHF 2,000,000 (approx. USD $2.45M / SGD $3.3M, November 2026)
High estimateCHF 4,000,000 (approx. USD $4.9M / SGD $6.6M, November 2026)
AuctionPhillips Geneva Watch Auction XXIV, Lot 95 — 7–8 November 2026

USD and SGD conversions are approximate as of November 2026 (CHF/USD ~1.225; CHF/SGD ~1.65). Estimates exclude buyer’s premium.

What the Estimate Says About the Current Market

The CHF 2–4M range places this lot above every other watch at Geneva XXIV — above the F.P. Journe Régence in platinum (CHF 1–2M), the Rolex “John Player Special” Daytona in yellow gold (CHF 800,000–1.6M), and the Rolex Ref. 6062 “Stelline” (CHF 600,000–1.2M). It is not outlandishly optimistic for a steel rattrapante 1436 with these qualifications. A pink gold example of the same reference sold for approximately CHF 2.2M at Christie’s Geneva in 2021; steel commands a meaningful premium over gold in this reference because the steel population is smaller. Phillips’ spring 2026 season exceeded $235M across three auctions — the most active period on record for the house — and the October 2026 auction month reinforced demand for independently certified, fresh-to-market material. A lot that is both — certified by Archive Extract and appearing at public auction for the first time — sits precisely where the market has shown its deepest appetite.

For anyone new to the investment-grade end of the market, the Grand Seiko vs Patek Philippe comparison on this site puts Patek’s position in the broader collector hierarchy in plain terms.

Other Lots to Follow at Geneva XXIV

The Ref. 1436 is not alone in making this sale worth watching. The Pucci Papaleo Rolex collection — assembled by one of the hobby’s most celebrated figures across five decades — occupies a significant block of lots, led by a yellow-gold Ref. 6241 Daytona with VCA bracelet stamp. The Vacheron Constantin Ref. 4261 made for the last Bey of Tunis carries Ottoman imperial provenance and an estimate of CHF 800,000–1.6M. The F.P. Journe Régence — the only Chronomètre à Résonance made with a shiny pink gold dial, produced for Les Ambassadeurs in 2002, estimate CHF 1–2M — closes out what Phillips is positioning as its most historically textured single-session autumn sale in years.

How to Bid

Phillips Geneva Watch Auction XXIV takes place on 7–8 November 2026 at the Hotel President Wilson, Geneva. The full Geneva week schedule — including Christie’s on 9 November and Sotheby’s online closing on 10 November — is set out in the session guide on this site. Registration for absentee or phone bidding is handled through phillips.com; live online bidding opens with the session. Note that watches of non-US origin may attract special import tariffs payable by the buyer; check the Phillips conditions of sale before bidding.

Verdict

The Ref. 1436 in stainless steel with original case and dial is the kind of lot that defines a season. If it performs above estimate — say, CHF 5M or higher — Geneva 2026 will be remembered for it. If it lands within estimate, it will still represent the largest single transaction of the week and perhaps of the autumn calendar. Either way, it is the clearest market reading available right now: what a genuinely irreplaceable mid-century Patek, in the rarest configuration of the rarest version of its reference, is worth to the people who compete for them. The answer comes on Saturday.

What is a split-seconds chronograph?

A split-seconds (rattrapante) chronograph has two concentric seconds hands that move together during normal operation. A dedicated pusher stops one hand while the other continues running, allowing the user to record an intermediate time without stopping the overall count. Pressing the pusher again causes the stopped hand to snap forward and rejoin the running hand. The mechanism is substantially more complex than a standard chronograph and requires precise manufacture of additional levers, springs and column-wheel components.

Why are stainless steel Patek Philippe complications from the 1940s so rare?

In the 1940s and 1950s, Patek Philippe produced its dress complications — repeaters, perpetual calendars, split-seconds chronographs — almost exclusively in yellow or pink gold. Stainless steel was considered a less prestigious material, reserved for sport or utility references. Very few complications were made in steel during this period, and fewer still survive with original cases and dials intact, making surviving examples considerably rarer than equivalent gold versions.

When and where can I bid on the Ref. 1436 at Phillips Geneva?

The watch appears as Lot 95 in Phillips Geneva Watch Auction XXIV at the Hotel President Wilson, Geneva on 7–8 November 2026. In-room, phone and online bidding are available; registration is handled through phillips.com. Buyer’s premium is charged on top of the hammer price — check the current scale on Phillips’ website before bidding.

What is a Patek Philippe Archive Extract and why does it matter at auction?

A Patek Philippe Archive Extract is a formal document confirming a watch’s production records: reference, movement serial, case material, dial specification, and the years of manufacture and retail sale. It does not guarantee that every current component is original, but it establishes a verified paper trail for the movement and its original configuration. At auction, Archive Extract-confirmed lots typically command a premium over otherwise comparable watches that lack this documentation.

Sources: Phillips press release, 15 September 2026; Haute Time (Adrienne Faurote), 28 October 2026.

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