Well we have figured out my anvil is a norrisez anvil 67# but now trying to figure out the D stamped below the weight stamps and a 3    3 on the end of the anvil. Any ideas.

anvils often have stray stampings on them; some may indicate the inspector, the team that built it, the base source or lot, etc and so on. Add in that an owner can stamp anything they want n it as well and you have a low chance of linking it with an exact item.

Probably an inspector's mark.  Exact function and meaning of some of these marks are lost to history.