Postwar Lionel O Gauge 110 watts Type R transformer in original box with instructions and a 1947 Form No. 497 instructions for assembling and operating.  Transformer has a super nice supple and un-cracked factory original cord.  Transformer looks C6.  Box has old masking tape (dry), clear packing tape at flap opening, faded and slightly worn label.  Box is still square and solid.