NEW YORK--(BUSINESS WIRE)--SL Green Realty Corp. (NYSE: SLG) today announced that Swarovski North America Ltd., the world-renowned Austrian designer of high quality crystal, has signed an 11+ year lease covering 17,850 square feet at 10 East 53rd Street, the 354,046-square-foot trophy tower currently undergoing a comprehensive $64 million redevelopment. Swarovski’s new office premises will be situated on the entire 26th and 27th floors of the 37-story building, offering sweeping Central Park vi