Nice Trenton anvil, AIA indicates 1924 production.
The 125 on the left side is the weight stamp.
Thanks for the pics, I added them to the Trenton logo database I have going. Your anvils carries the 7th style of Trenton logo stamp they used in U.S. production.
I have also recorded the sequential anvil to yours, 188284, also stamped Lakeside, and also the same 125 pounds.