BERLIN, Dec 1 (Reuters) - A striking self-portrait created by artist Max Beckmann during World War Two after he fled Nazi Germany was sold for 23.2 million euros on Thursday, a record price for a painting auctioned in Germany, Villa Grisebach auction house said. The auctioneers, in Berlin, had estimated that "Self-portrait in yellow-pink", painted in 1943, would attract bids of between 20 million and 30 million euros. "With this result Grisebach has set an international benchmark for the German art trade and once again made Berlin a venue for world-class auction results," said Bernd Schultz, senior partner at Grisebach....