Adjustable height, and 360-degree swivel. Made by the Toledo Metal Furniture Company, probably in the late 1960s or early 1970s. Purchased used in the late 1970s from Western Electric Corp., when they closed their Buffalo factory. Original upholstery is failing, but still usable. The upholstery is easily removed for replacement, or use the stool without it. Seat bottom and backrest are both plastic, the sturdy frame is all metal.
No need to ask if this is available, I will delete the ad when it sells.