SteelWelder

I acquired this 129 lb Trenton Anvil recently. It was my grandfather's and I remember working with him on it in his basement. There is no diamond around the name. There's a 3 stamped on one of the feet, so I'm wondering if that's the serial number. There appears to be a 1 stamped on the opposite side of the name. There are no other markings that could help me date it. It is 23.75" long, 10.25" high, and 4.25" wide. Could anyone help me discern its history?