A Distinctive Duplex Home.   This handsome seven room residence feels more like a house than an apartment. With a semi-private landing, the charming entrance floor foyer opens to a spacious living room with nearly 10' ceilings, a woodburning fireplace, and Venetian plaster walls.   The adjacent formal dining room, with custom built-ins and two exposures, expands the entertaining space.   The windowed eat-in-kitchen features stainless steel appliances, abundant storage, and granite countertops.  In addition, there is a staff room and full bath on the main floor.  Upstairs, the large master bedroom has a windowed ensuite bathroom and a walk-in closet.   The two other well-proportioned bedrooms share a second bathroom with Waterworks fixtures. On this floor, there are abundant closets, washer/dryer, and convenient elevator access.    Throughout this home, the original prewar details  include herringbone hardwood floors, beamed ceilings, and oversized windows; the 21st century updates include through-the-wall air conditioning and wiring for cable, internet, and sound.  This apartment comes with two large basement storage cages. Move-in today to your quiet, bright, and delightful home.