Wow! Antique-shop.com forums are in the big #1 spot on Google for the search term "antique shop forum", for 4 years running!Thanks to YOU.
I think all the folks will be (I hope) happy to hear that you've got yourself a handle assembly from a circa 1875 "Charter Oak" lawnmower , jdanko !(They were advertised as "So light even a woman can operate it.")
You're welcome , jdanko .Now the task would be finding the rest of the Hills Archimedean Lawn Mower Company's Charter Oak model (as below) !
LOL !! I guess the people you bought it from thought potato harvester sounded better than " its a lawn mower handle" !!