Forbes recently took a tour of the three bedroom, two bathroom triplex with co-listing agent Robert Morrison of Prudential Douglas Elliman Real Estate.
Other upgrades include a new spring-loaded, adaptive rear wing and the Triplex rear suspension, comprising a bidirectional hydraulic strut mounted horizontally between the pushrod rockers.
Ms. Lambert, the long-time broker for the Ronsons, said a potential buyer could choose to live in the triplex and use the maisonette for staff or guests and the penthouse for entertaining.