LONDON, UNITED KINGDOM - DECEMBER 01, 2023: A technician holds the master of the Chetwode Quadrant, an English horary quadrant, circa 1311, the earliest dated English scientific instrument (estimate: Ł100,000-150,000) during a photocall at Christie's auction house showcasing the highlights from the Classic Week Sales in London, United Kingdom on December 01, 2023. Spanning art from antiquity to the 21st century, with six live auctions and one online sale, the Classic Week Sales series will run from 1 to 15 December. (Photo by WIktor Szymanowicz/NurPhoto) (Photo by WIktor Szymanowicz / NurPhoto / NurPhoto via AFP)