3 min read · 11 Dec 2025

Hippopotame Bar, pièce unique by François-Xavier Lalanne sold for $31.43m. Image courtesy of Sotheby's
A work by François-Xavier Lalanne was the headline sale at Sotheby's 'Important Design, Featuring Works from the Schlumberger Collection' auction on December 10 in New York.


The star lot was: François-Xavier Lalanne, Hippopotame Bar, pièce unique (1976), which sold for $31.43m, 349% above its $7m low estimate. It has been traded once in the past.

The outperformer sold for 1220% above its low estimate. Mattia Bonetti, Bed (2016), sold for $66,000 ($5,000 low estimate). It has been traded once in the past.

Breakdown of results against auction house estimates that are disclosed
1 work was backed by a guarantee: Wendell Castle, A Unique Floor Lamp (1967). It sold for $152,400, 27% above its $120,000 low estimate. It has been traded 4 times in the past.
10 works were bought-in, including: Jean Prouve, "S.A.M." Table for the Air France Headquarters in Brazzaville, Congo (1952), estimated at $400,000 (low) to $600,000 (high). It has been traded 4 times in the past.
0 works were withdrawn
All results include the fees and premiums added to the price of a work of art when the auctioneer's hammer falls. Sale prices are compared to the auction house’s low estimate, which do not include premiums.
Guarantees: Sometimes an auction house guarantees to pay a seller for a work, regardless of whether the bidding reaches the reserve price, a figure that is typically confidential.
Bought-in: If there are no bids for a work, or if bidding falls short of the reserve price, the lot is unsold or “bought-in”.
Withdrawn: This happens when a seller decides, for whatever reason, to withdraw a work before the bidding begins.
Premiums: Typically a sliding-scale of charges paid in addition to the hammer price by the buyer, plus any other fees.
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