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I am pretty sure this is from the 70's. The previous owner said his father worked for IBM in the 70's and 80's and they let employees take these when they remodeled. I have 2 but only this one has the IBM sticker. Chair is in very good used condition. Fabric is a little dirty and has a few small pulls. The aluminum base is tarnished and has a few scuffs and scratches but presumably could be polished. There are some small scuffs to the plastic back but overall very good. Piece needs a little cleaning up but overall a good-looking chair.
I have a number of Mid Century / Danish modern pieces for sale if you want to look at the "more ads by this seller link" on Craigslist.
Piece is available in Northern RI. I am about 20 minutes from Providence and a little over an hour from Boston or Hartford.