Calatrava, Ref: 3445/6, Manufactured 1971, Purchased September 29th 1977 — Patek Philippe. A fine 18K white gold automatic calendar bracelet watch with sigma dial

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Estimate: £6,000–£8,000 hammer ≈ $7,575–$10,100
Result
Performance
Sale: Bonhams — Watches and Wristwatches, London, Knightsbridge · 21 February 2024
Record ID: TB-2026-396705
Record: first seen 20 Jul 2026 · updated 22 Jul 2026 · source ↗
Cite this record: TB-2026-396705 — https://thebasis.art/cite/TB-2026-396705

Patek Philippe. A Fine 18k White Gold Automatic Calendar Bracelet Watch With Sigma Dial, Calatrava, Ref: 3445/6, Manufactured 1971, Purchased September 29th 1977. Bonhams, 21 Feb 2024, lot 80. result recorded. TheBasis.Art, TB-2026-396705.

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Patek Philippe. A Fine 18k White Gold Automatic Calendar Bracelet Watch With Sigma Dial, Calatrava, Ref: 3445/6, Manufactured 1971, Purchased September 29th 1977. Bonhams, 21 Feb 2024, lot 80. result recorded. TheBasis.Art, TB-2026-396705.

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From the same sale Watches and Wristwatches · Feb 2024

Lot	Artist	Estimate
Chester Hallmark for 1892	Joseph Penlington, 14 Oxton Road, Birkenhead. An 18k Gold Key Wind Open Face Pocket Watch	£2,000–£2,500
Circa 1909	Henry Moser & Co. A 14k Gold Keyless Wind Full Hunter Pocket Watch	£2,000–£2,500
Circa 1910	Vacheron & Constantin. An 18k Gold Keyless Wind Open Face Pocket Watch Retailed By Mascort & Bonturi, Buenos-aires	£2,500–£3,000
Circa 1924	International Watch Co, Schaffhausen. A 14k Gold Open Face Keyless Wind Pocket Watch	£800–£1,200
'Dirty Dozen', Circa 1940	Jaeger-lecoultre. A Chrome Plated Stainless Steel Manual Wind Military Issue Wristwatch	£2,000–£3,000
Circa 1940	Vacheron Constantin. An 18k White Gold Manual Wind Wristwatch	£1,500–£2,000

Comparable results nearest sold works, same medium & price band

Artist	Lot	Result USD, incl. premium	Sale
Patek Philippe. A Fine 18k White Gold Automatic Calendar Bracelet Watch With Sigma Dial	Gondolo, Ref: 5030/22J-001, Purchased 20th December 2000	$16,946	Bonhams, Jun 2022
Rolex. A Stainless Steel Automatic Calendar Bracelet Watch With Dual Time Zone	GMT-Master 'Pepsi', Ref: 1675, Circa 1978		Bonhams, Sep 2025
Rolex. A Stainless Steel Automatic Calendar Bracelet Watch With Dual Time Zone	GMT-Master, Ref: 16750, Purchased 27th April 1981		Bonhams, Sep 2024
Patek Philippe. An 18k Gold Manual Wind Wristwatch	Calatrava, Ref: 3919, Purchased 7th April 1997		Bonhams, Nov 2025
Patek Philippe. A Fine 18k White Gold Automatic Calendar Bracelet Watch With Sigma Dial	Ellipse, Ref: 3605-1, Circa 1970		Bonhams, Sep 2022
Patek Philippe. A Fine 18k White Gold Automatic Calendar Bracelet Watch With Sigma Dial	Ellipse, Ref: 3604/2, Purchased 5th September 1975		Bonhams, Feb 2023
Rolex. A Stainless Steel Automatic Calendar Bracelet Watch With Dual Time Zone	Rolex. Belle montre bracelet en acier avec date et 2nd fusea		Bonhams, Oct 2025
Patek Philippe. An 18k Gold Manual Wind Wristwatch	Calatrava, Ref: 3520, Purchased 22nd June 1977		Bonhams, Nov 2024

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.