Gerhard Richter Auction

  This undated photo provided by Christie's shows “Prag 1883” by German abstract artist Gerhard Richter that is going on the auction block in New York City. Christie's says the painting is estimated to sell “in the region of $15 million” on Nov. 14. (AP Photo/Christie's)
This undated photo provided by Christie's shows “Prag 1883” by German abstract artist Gerhard Richter that is going on the auction block in New York City. Christie's says the painting is estimated to sell “in the region of $15 million” on Nov. 14. (AP Photo/Christie's)

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