Hello, Ken. This was given to me by my dad, who received it from his father-in-law (my grandfather). We are guessing my dad received it around 1950, and that my grandfather owned it in the 30's, so this example is at least 80 years old. Toledo Machine was founded in 1888, and Ridgid (The Ridge Tool Co.) had always been based in Ohio, first in Ridgeville,Ohio, and then to its current location in Elyria, Ohio. I tried to find a link between the 2 companies, but no luck. Regards, Lou