Mine is from the early 1900s, perhaps around 1915. This is a photo of what mine looks like. The light binding post is on the right side in front of the bell. This is from a diagram which was posted online. Here is a link to the diagram. I can't upload in this reply due to an error message saying the upload folder is full.  http://pictures.olsenstoy.com/searchcd31.htm?itm=967