I have one of these similar to what you are showing. The outside is steel by Schroeder's Milwaukee. It was produced for a company here in Spokane, WA. Interesting part is that it was made for Frank Johnson &Son Dealers in Hardwood Lumber in Spokane, WA. Frank Johnson was Abraham Lincoln's body guard during the Civil War. He later came to our area and built some of our first big buildings. A church, first building at Gonzaga University, etc. He is buried here. As a child we lived near the cemetery and would take walks thru there. We always wondered who this person was that was Abraham Lincolns body guard. Anyway, I did not know if this lumber scale has any value. I am throwing out a lot of things that maybe I shouldn't be.