Lionel Postwar O-Gauge Type S 80 Watt Transformer W/ Whistle Control 1947 Only.  Tested and working including whistle control.  Has two variable and three fixed circuits.  This transformer is suited for a basic Lionel, American Flyer, Marx or similar AC-operated train set.  The cord is flexible with no cracking.  From a smoke free home.  Free shipping to lower 48.