Audemars Piguet Platinum Single-button Chronograph with two-tone dial (1930)

Case is 27.5mm wide, 34.5mm overall length, platinum. Dial is two-tone grey and white. Movement is manual with single-button chronograph. Remark: Unique piece, one of the first three AP chronograph wristwatches ever made. Circa 1930  Estimate CHF 200,000 – CHF 400,000. Sold for CHF 2,134,000 at Christies Auction 12 May 2026 Geneva