Patek Philippe. An extremely rare and fine 18K gold open face keyless wind pocket watch with duplex escapement Patek Philippe. Très belle et rare montre de gousset à cadran ouvert en or jaune 18K (750) à échappement duplex remontoir au pendant Manufactured in 1847, purchased September 22nd 1849 — Patek Philippe. An extremely rare and fine 18K gold open face keyless wind pocket watch with duplex escapement Patek Philippe. Très belle et rare montre de gousset à cadran ouvert en or jaune 18K (750) à échappement duplex remontoir au pendant Manufactured in 1847, purchased September 22nd 1849

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Estimate: €30,000–€40,000 hammer ≈ $34,143–$45,524
Result
Performance
Sale: Bonhams — Paris Fine Watches Online, Paris, Avenue Hoche · 26 May 2025
Record ID: TB-2026-060076
Record: first seen 20 Jul 2026 · updated 22 Jul 2026 · source ↗
Cite this record: TB-2026-060076 — https://thebasis.art/cite/TB-2026-060076

Patek Philippe. An Extremely Rare And Fine 18k Gold Open Face Keyless Wind Pocket Watch With Duplex Escapement Patek Philippe. Très Belle Et Rare Montre De Gousset À Cadran Ouvert En Or Jaune 18k, Patek Philippe. An extremely rare and fine 18K gold open face keyless wind pocket watch with duplex escapement Patek Philippe. Très belle et rare montre de gousset à cadran ouvert en or jaune 18K (750) à échappement duplex remontoir au pendant Manufactured in 1847, purchased September 22nd 1849. Bonhams, 26 May 2025, lot 3013. bought in (did not sell). TheBasis.Art, TB-2026-060076.

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Patek Philippe. An Extremely Rare And Fine 18k Gold Open Face Keyless Wind Pocket Watch With Duplex Escapement Patek Philippe. Très Belle Et Rare Montre De Gousset À Cadran Ouvert En Or Jaune 18k, Patek Philippe. An extremely rare and fine 18K gold open face keyless wind pocket watch with duplex escapement Patek Philippe. Très belle et rare montre de gousset à cadran ouvert en or jaune 18K (750) à échappement duplex remontoir au pendant Manufactured in 1847, purchased September 22nd 1849. Bonhams, 26 May 2025, lot 3013. bought in (did not sell). TheBasis.Art, TB-2026-060076.

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From the same sale Paris Fine Watches Online · May 2025

Lot	Artist	Estimate
Sauvage à Paris. An 18K gold open face key wind pocket watch Sauvage …	Sauvage À Paris. An 18k Gold Open Face Key Wind Pocket Watch Sauvage À Paris. Montre De Gousset À Cadran Ouvert En Or Jaune 18k	€1,800–€2,200
Courcol, Cambrai. An 18K gold open face quarter repeating key wind po…	Courcol, Cambrai. An 18k Gold Open Face Quarter Repeating Key Wind Pocket Watch Courcol, Cambrai. Montre De Gousset À Cadran Ouvert En Or Jaune 18k	€3,000–€4,000
Nourrifson, Genève. An 18K gold open face key wind pocket watch Nourr…	Nourrifson, Genève. An 18k Gold Open Face Key Wind Pocket Watch Nourrifson, Genève. Montre De Gousset À Cadran Ouvert En Or Jaune 18k	€1,500–€2,000
Chanet à Paris. An 18K gold open face key wind pocket watch Chanet à …	Chanet À Paris. An 18k Gold Open Face Key Wind Pocket Watch Chanet À Paris. Montre De Gousset À Cadran Ouvert En Or Jaune 18k	€800–€1,200
Tiffany & Co. A fine full hunter 18K gold keyless wind pocket watch T…	Tiffany & Co. A Fine Full Hunter 18k Gold Keyless Wind Pocket Watch Tiffany & Co. Belle Montre De Poche À Clapet En Or Jaune 18k	€1,500–€2,000
Hardel, Paris. An 18K gold open face double cased key wind pocket wat…	Hardel, Paris. An 18k Gold Open Face Double Cased Key Wind Pocket Watch Hardel, Parris. Montre De Gousset À Cadran Ouvert En Or Jaune 18k	€1,800–€2,200

Comparable results nearest sold works, same medium & price band

Artist	Lot	Result USD, incl. premium	Sale
Patek Philippe. An Extremely Rare And Fine 18k Gold Open Face Keyless Wind Pocket Watch With Duplex Escapement Patek Philippe. Très Belle Et Rare Montre De Gousset À Cadran Ouvert En Or Jaune 18k	Patek Philippe. An extremely rare and fine 18K gold open fac	$26,913	Bonhams, Oct 2025
Rolex. A Fine And Rare Stainless Steel Manual Wind Chronograph Bracelet Watch	Cosmograph, Ref: 6265/6263, Sold 30th July 1976		Bonhams, Dec 2019
Rolex. A Stainless Steel Automatic Chronograph Bracelet Watch	Cosmograph Daytona, Ref: 116500LN, Purchased 5th December 20		Bonhams, Feb 2021
Rolex. A Stainless Steel Automatic Calendar Bracelet Watch With Dual Time Zone	GMT-Master, Ref: 6542, Purchased 23rd February, 1960		Bonhams, Oct 2024
Rolex. A Stainless Steel Automatic Chronograph Bracelet Watch	Cosmograph Daytona, Ref: 16520, c. 1991		Bonhams, Oct 2024
Rolex. A Fine And Rare Stainless Steel Manual Wind Chronograph Bracelet Watch	Cosmograph Daytona 'Floating Big Red', Ref: 6263, Circa 1976		Bonhams, Dec 2023
Rolex. A Fine And Rare Stainless Steel Manual Wind Chronograph Bracelet Watch	Cosmograph Daytona 'Big Red', Ref: 6263, Circa 1978		Bonhams, Dec 2022
Audemars Piguet. A Mid-size Stainless Steel Quartz Calendar Bracelet Watch	Audemars Piguet. Montre bracelet de taille medium en acier a		Bonhams, Jun 2026

The closest sold results by price, artist, and medium — the appraiser's comp set, generated from the corpus. All figures converted to USD at current reference rates.