Thanks Daswulf and Irondragon!
Rebound is between 70-90% depending on where I bounce the bearing, and the ring is good. I was really excited to find this one, as I had family working in Butte in the early 1900's.
Almost broke my back unloading this today when the boards slipped out from under me. Thankfully I am just a little sore. I searched through all the Trenton posts and couldn't find any similar looking one's to compare age.
Does anyone have any ideas on age, metal used, or manufacturing facility on this one? I am ordering Anvils in America tonight but I thought there might be someone who has an eye for different types of Trenton's.