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: £12,000–£18,000 hammer ≈ $16,228–$24,342
Result
Performance
Sale: Bonhams — London Watches, London, Knightsbridge · 25 February 2026
Record ID: TB-2026-042058
Record: first seen 20 Jul 2026 · updated 22 Jul 2026 · source ↗
Cite this record: TB-2026-042058 — https://thebasis.art/cite/TB-2026-042058

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, 25 Feb 2026, lot 58. bought in (did not sell). TheBasis.Art, TB-2026-042058.

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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, 25 Feb 2026, lot 58. bought in (did not sell). TheBasis.Art, TB-2026-042058.

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From the same sale London Watches · Feb 2026

Lot	Artist	Estimate
Prince, Ref: 1527, Circa 1930	Rolex. A Two Colour 18k Gold Manual Wind Wristwatch	£4,000–£6,000
Prince Aerodynamic, Ref: 3361, Circa 1940	Rolex. A 9k Gold Manual Wind Drivers Watch	£7,000–£9,000
Depthomatic, Circa 1960	Nivada Grenchen. A Stainless Steel Automatic Calendar Wristwatch With Depth Gauge	£2,000–£3,000
Seamaster 600 'PloProf', Purchased 8th April 1974	Heuer. A Stainless Steel Automatic Calendar Wristwatch	£4,000–£6,000
Speedmaster Professional, Ref: 145022-69 ST, Circa 1971	Omega. A Stainless Steel Manual Wind Chronograph Bracelet Watch	£3,000–£4,000
Constellation, Ref: 1685004, Birmingham Hallmark for 1963	Omega. An 18k Gold Automatic Calendar Bracelet Watch	£2,000–£3,000

Comparable results nearest sold works, same medium & price band

Artist	Lot	Result USD, incl. premium	Sale
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	$17,154	Bonhams, May 2026
Rolex. A Stainless Steel Automatic Calendar Bracelet Watch With Dual Time Zone	GMT Master 'Pepsi', Ref: 6542, Circa 1959		Bonhams, Dec 2021
Rolex. A Stainless Steel Automatic Calendar Bracelet Watch With Dual Time Zone	Explorer II, Ref: 1655, Circa 1975		Bonhams, Sep 2022
Omega. A Stainless Steel Automatic Calendar Bracelet Watch	Single Red Submariner, Ref: 1680, Purchased 1975		Bonhams, Apr 2023
Omega. A Stainless Steel Automatic Calendar Bracelet Watch	Sea-Dweller Deepsea, Ref: 126660, Purchased 9th July, 2020		Bonhams, Nov 2025
Rolex. A Stainless Steel Automatic Calendar Bracelet Watch With Dual Time Zone	Explorer II, Ref: 1655, Purchased 23rd June 1984		Bonhams, Dec 2020
Rolex. A Stainless Steel Automatic Calendar Bracelet Watch With Dual Time Zone	GMT-Master II 'Root Beer', Ref: 126711CHNR, Purchased 17th D		Bonhams, Feb 2023
Omega. A Stainless Steel Automatic Calendar Bracelet Watch	Sea Dweller Deepsea, Ref: 126660, Purchased 5th January 2019		Bonhams, Feb 2023

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.