Here is a picture of the bottom. I have also heard that it might be a Hay Budden manufactured for another company based on the numbers. http://i1059.photobucket.com/albums/t440/mlisac/138anvil6.jpg
Just picked this anvil up on Craigslist. It was covered in junk and surface rust. A little elbow grease got it cleaned up. I weighed it at about 137lbs. I can't figure out who the manufacturer is. It has a nice ring and a very good bounce back. Please help if you can.