The COOKFOX-designed tower at 301 East 50th Street topped out today, just over two years after permits were filed for the 29-story building. 301 East 50th Street will join the growing arsenal of pricey residential towers with a limestone facade when it's installed in the next few weeks. Word of the building's rise to its superlative height comes from the site's marketing team, who also sends news that the 57-apartment building is now over 30-percent sold following its May launch. Current listings in the Turtle Bay tower range from the $1.825 million 1BR/1.5BA 7B to the $4.9 million 3BR/3.5BA 23A. The building's priciest pad, the $10.5 million 3,729-square-foot PH A, has already sold, but its last remaining penthouse, PHB, will come to market for around $10 million.