Despite its former life as an old 1880s clock factory, 420 12th Street in Park Slope is now a timeless three-bedroom, two-and-a-half-bath duplex. 6sqft reports that Hurley & Farinella Architects worked diligently to maintain original details like exposed brick, factory beams and wood ceilings, combining them with modern updates that mesh seamlessly with the building’s historic bones. See more of the character-filled new space here.