I can't tell if it's a traIn or not, but on the other button:
"Sanforized" relates to a process for pre-shrinking fabric before making it into a garment.
The word was registered as a trademark for overalls (among other things) by the GTB Holding Corporation of Delaware on 29 August 1944 and cancelled on 2 May 2016 after failure to renew.
The unrealistic asking price above related to a set of overalls, not just the button.
I have dug several of those over the years. Most have been recovered at old home sites that were active in the 1890s. I beleive that they are off some type of a brand of overalls.