Lionel Transformer Type 1011X - 25W, 115V, 25 Cycles (Hz). I am not a Lionel guy so I don't know anything about this transformer. As a 25 Cycles transformer is it unusual, or collectible, or scarce? I really don't know. Also I have never seen a Lionel plug such as this one. Note also that this has three side terminals unlike any other on ebay at the moment. I don't know if it works - I didn't want to risk plugging it into a 60Hz wall outlet and watch it smoke. Sorry no box. Send me a message if you know something about this particular transformer.