ResidentialDONE DEALS: 21W20 Gale penthouse fetches $17MREWJuly 8, 2016July 11, 2016 by REWJuly 8, 2016July 11, 201611609 A PENTHOUSE at the Gale International-built 21W20 has just closed at $17 million. Stephen McArdle of Halstead Property Development Marketing (HDPM) and Rachel Glazer of...