Have a look inside Frank Sinatra's old Manhattan penthouse, which has just hit the market for $7.7M. Ol' Blue Eyes lived here from 1961 to 1972, and if those stairs look familiar it's because they represent the wave of the future: they're "the exact same one used in the Apple Stores," boasts the brokerbabble proudly. Curbed NY has a tour. [Curbed NY]
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