Sotheby's will stage its "Contemporary Day Auction, including Works on Paper from the Duerckheim Collection" in London on 16 October 2026, offering 165 works with pre-sale estimates totalling $11.89 million (GBP 8.98 million) at the low end and $17.3 million at the high end, excluding premiums. Every lot carries a disclosed estimate. The highest-value lot announced is Donald Judd's "Untitled" (1989), estimated between $463,600 and $728,600. The work has traded twice before, and its position as the sale's headline lot reflects the continuing strength of Judd's late geometric work in the day-sale market, where collectors pursue prime examples of established post-war names at accessible price points. Fourteen works are backed by guarantees, the mechanism by which the auction house assures a seller payment regardless of whether bidding reaches the reserve price. Among them is Arnaldo Pomodoro's bronze "Sfera" (1967), estimated at $264,900 to $397,400, which has changed hands three times previously — a trading history that lets buyers weigh its estimate against documented market performance. The sale folds works on paper from the Duerckheim Collection into Sotheby's contemporary day offering, a format the house has increasingly used to give single-collection material broader market exposure. Staged in the middle of October, the auction lands in London's busiest autumn sales window, when the city's auction houses concentrate contemporary consignments to capture attention from collectors visiting for the season's fairs and selling exhibitions. All estimates are converted into US dollars and were accurate at time of publication. The day-session format typically draws both trade and private buyers seeking established names without the evening-sale premiums.