Old spools like this one are fairly common at antique shops and tag sales. I found this one at the Brimfield flea market last year. It says “Bethlehem Strand”, and probably held wire rope made at the now defunct Bethlehem Steel in Pennsylvania. I’m going to give it new life by turning it into a rustic ottoman. The top will be removable so it can double as a coffee table.
Fun fact: Bethlehem Steel was established in 1904 and was America’s second largest steel producer and the largest shipbuilder. The company manufactured steel for many notable landmarks like Madison Square Garden, Alcatraz, the Hoover Dam, and the Golden Gate Bridge.