I have been using this anvil for a couple of years now and decided to ID it. Markings on the side are mostly obscured even after extensive cleaning, however the foot has clear markings as follows: Left side under horn '135', Following that to left 'A 147095', Under the heel is a 'U', on the sides appear to be the letters 'WISMITH' in 1/4 inch letters. These letters appear to be only a portion of what was there originally and I am thinking they were added during the life of the anvil.
Thank you for the help.