Datejust, Ref: 6605, Circa 1956 — Rolex. A fine and rare 18K gold automatic calendar bracelet watch with depth rating and 'Superlative Chronometer By Official Test' dial retailed by Serpico Y Laino

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Estimate: £10,000–£15,000 hammer ≈ $13,402–$20,103
Result
Performance
Sale: Bonhams — London Watches, London, Knightsbridge · 20 May 2026
Record ID: TB-2026-041870
Record: first seen 20 Jul 2026 · updated 29 Jul 2026 · source ↗
Cite this record: TB-2026-041870 — https://thebasis.art/cite/TB-2026-041870

Rolex. A Fine And Rare 18k Gold Automatic Calendar Bracelet Watch With Depth Rating And 'superlative Chronometer By Official Test' Dial Retailed By Serpico Y Laino, Datejust, Ref: 6605, Circa 1956. Bonhams, 20 May 2026, lot 38. result recorded. TheBasis.Art, TB-2026-041870.

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Rolex. A Fine And Rare 18k Gold Automatic Calendar Bracelet Watch With Depth Rating And 'superlative Chronometer By Official Test' Dial Retailed By Serpico Y Laino, Datejust, Ref: 6605, Circa 1956. Bonhams, 20 May 2026, lot 38. result recorded. TheBasis.Art, TB-2026-041870.

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From the same sale London Watches · May 2026

Lot	Artist	Estimate
Ref: 6898, Circa 1970	Vacheron Constantin. A Lady's 18k White Gold Manual Wind Bracelet Watch	£6,000–£8,000
Chronomat, Ref: 769, first series, Circa 1940	Breitling. A Stainless Steel Manual Wind Chronograph Wristwatch	£3,000–£4,000
Ref: 6352, London Import mark for 1969	Vacheron & Constantin. An 18k Gold Manual Wind Bracelet Watch	£4,000–£6,000
Ref: 3260, Circa 1963	Patek Philippe. An 18k Gold Manual Wind Wristwatch	£2,000–£2,500
Navitimer, Ref: 806, Circa 1961	Breitling. A Gold Plated Stainless Steel Manual Wind Chronograph Wristwatch	£2,000–£3,000
Calatrava, Ref: 3468 5, Circa 1970	Patek Philippe. An 18k White Gold Manual Wind Bracelet Watch With Sigma Dial	£6,000–£8,000

Comparable results nearest sold works, same medium & price band

Artist	Lot	Result USD, incl. premium	Sale
Omega. A Stainless Steel Automatic Calendar Bracelet Watch	GMT Master 'Pepsi', Ref: 1675, Circa 1972	$17,146	Bonhams, Nov 2021
Omega. A Stainless Steel Automatic Calendar Bracelet Watch	Sea-Dweller, 'Great White', Ref: 1665, c.1977		Bonhams, Oct 2021
Omega. A Stainless Steel Automatic Calendar Bracelet Watch	Sea-Dweller Deepsea, Ref: 126660, Purchased 9th July, 2020		Bonhams, Nov 2025
Omega. A Stainless Steel Automatic Calendar Bracelet Watch	Sea Dweller Deepsea, Ref: 126660, Purchased 5th January 2019		Bonhams, Feb 2023
Rolex. A Stainless Steel Automatic Calendar Bracelet Watch With Dual Time Zone	GMT Master II 'Batgirl', Ref: 126710 BLNR, Purchased 15th Ju		Bonhams, Jun 2022
Omega. A Stainless Steel Automatic Calendar Bracelet Watch	Rolex. Montre bracelet en acier avec date mouvemet automatiq		Bonhams, Oct 2024
Omega. A Stainless Steel Automatic Calendar Bracelet Watch	Single Red Submariner, Ref: 1680, Circa 1974		Bonhams, Dec 2021
Rolex. A Stainless Steel Automatic Calendar Bracelet Watch With Dual Time Zone	Explorer II "Steve McQueen/Freccione", Ref: 1655, Circa 1978		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.