Big Pilot 7-days, Ref: IW5004-01, c. 2010s — IWC. A STAINLESS STEEL AUTOMATIC CALENDAR WRISTWATCH

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Sale: Bonhams — Watches Online, Online, New York · 8 September 2025
Record ID: TB-2026-080144
Record: first seen 20 Jul 2026 · updated 20 Jul 2026 · source ↗
Cite this record: TB-2026-080144 — https://thebasis.art/cite/TB-2026-080144

Heuer. A Stainless Steel Automatic Calendar Wristwatch, Big Pilot 7-days, Ref: IW5004-01, c. 2010s. Bonhams, 8 Sep 2025, lot 1056. bought in (did not sell). TheBasis.Art, TB-2026-080144.

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Heuer. A Stainless Steel Automatic Calendar Wristwatch, Big Pilot 7-days, Ref: IW5004-01, c. 2010s. Bonhams, 8 Sep 2025, lot 1056. bought in (did not sell). TheBasis.Art, TB-2026-080144.

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From the same sale Watches Online · Sep 2025

Lot	Artist	Estimate	Result
Tank Solo, Ref: 3169, c. 2010s	[no Reserve] Cartier. A Stainless Steel Quartz Wristwatch	$1,000–$2,000
Seamaster de Ville, c. 1960s	[no Reserve] Omega. A 14k Gold Filled Automatic Bracelet Watch	$1,000–$2,000	upcoming
Ref: H5360, c. 1974	Omega. A Gold Plated And Stainless Steel Manual Wind Bracelet Watch	—
c. 1965	[no Reserve] Garrad. An 18k Gold Manual Wind Wristwatch	$500–$1,000
Matic 1000, c. 1970s	[no Reserve] Eterna. A 14k Gold Automatic Calendar Wristwatch	$500–$1,000
Pre-professional Chronograph, Ref: 3525/14A, c. 1965	Wittnauer. A Stainless Steel Manual Wind Chronograph Wristwatch	—

Comparable results nearest sold works, same medium & price band

Artist	Lot	Result USD, incl. premium	Sale
Heuer. A Stainless Steel Automatic Calendar Wristwatch	Dynamic, Circa 1970	$385	Bonhams, Aug 2026
Heuer. A Stainless Steel Automatic Calendar Wristwatch	Constellation , Ref: 168.005, Circa 1966		Bonhams, Aug 2026
Heuer. A Stainless Steel Automatic Calendar Wristwatch	Cartier. Montre bracelet en acier avec date mouvement automa		Bonhams, Jun 2026
Heuer. A Stainless Steel Automatic Calendar Wristwatch	Single Red Submariner, Ref: 1680, Circa 1973		Bonhams, Feb 2026
Heuer. A Stainless Steel Automatic Calendar Wristwatch	Submariner, Ref: 16800, Circa 1984		Bonhams, Feb 2026
Heuer. A Stainless Steel Automatic Calendar Wristwatch	Portofino, Ref: IW356501, Purchased 19th August 2020		Bonhams, Feb 2026
Heuer. A Stainless Steel Automatic Calendar Wristwatch	Fliegeruhr, Ref: IW3256-01, Purchased 26th December 2007		Bonhams, Oct 2025
Heuer. A Stainless Steel Automatic Calendar Wristwatch	Portofino, Ref: 3563, Purchased 19th February 2011		Bonhams, Sep 2025

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.