An unusual stock certificate from 1924 from a company called Roulette de Monte Carlo, handsigned by Marcel Duchamp, was hammered at a Christie's auction for $1,082,500 including buyers premium. The certificate features a portrait of Duchamp by Man Ray, with Duchamp's face almost completely covered in shaving cream, and his hair pointed into horns like a devil. There have been plenty of other old stock certificates, such as Houdini Picture Company stock certificates signed by Houdini, which sells for several thousand dollars, and even fairly modern worthless stock certificates, such as Enron , which sells for around $100. But the Duchamp certificate has achieved the highest price of any antique stock certificate by hundreds of thousands of dollars.
