LONDON (Reuters) – The wedding dress worn by film star Elizabeth Taylor for her first marriage to hotel heir Conrad Hilton in 1950 will go up for sale next month, auction house Christie's said on Friday. The simple, but elegant garment created by Hollywood costume designer Helen Rose for the then 18-year-old Taylor is an oyster shell-colored, floor-length satin gown with a fine silk gauze off-the-shoulder illusion neckline. The dress, which was a gift from MGM film studios, has a top estimate of 50,000 pounds ($75,300). …