4 Early 1900's Vintage Industrial Switchbord Operator Swivel Stool Chairs

I bought this set of 4 at an estate sale in MA. They didn't know that they use to be switchboard operator chairs (neither did I) until I did my research. I can only find older single chairs from the 40's for sale. I only had to reupholster the seat cushion. I'm moving south, so I decided to post them on Craigslist Boston. Hopefully it works out!