The duplex penthouse in 18 Gramercy Park set a Downtown record (and held it very briefly) when it sold for $42 million to the owner of the Houston Rockets. Now another exorbitantly priced duplex in the Robert A.M. Stern-designed, Zeckendorf-developed building has hit the market—a potential combo of the units that occupy the entire 15th and 16th floors is listed for $37.65 million. According to the provided floorplan, both units have the same exact layout, and the 16th floor is listed individually for $18.9 million. The 15th floor is only listed as part of the combo. Each unit is 4,207 square-foot with four beds, five full baths, and a powder room, although the brokerbabble describes the potential combined apartment as "customizable." Together, the two units boast 68 windows.