The centerpiece of the apartment is an old remote-controlled airplane Mattan inherited from a friend who used to be a visual merchandiser for Jack Spade. “I’m obsessed with airline travel and airplanes; I even have my single-engine license, though it’s expired. So this was a gift — one of the very first, very useful things I got,” Mattan laughs. “I walked it over all the way from Park Avenue because it didn’t fit in a car or a subway. There was no UberXL back then.” The disco ball Mattan calls “a classic design object.”