I was on my way home from the vet when I spied an estate sale sign; I told the kitten I had recently rescued, that he was going to have to chill for a few while I took a quick poke around. Man, did I miss a good sale! If I had been waiting at 9:00A.M. I would have had a shot at a house full of vintage Knoll and Herman Miller furniture (Apparently there had been a Florence Knoll sofa, A Saarinen womb chair w/ ottoman plus a tulip table w/ four chairs, some sort of Herman miller desk and bedroom furniture)- sigh. What I did walk off with was this solid frame, leather covered Hardoy "butterfly" chair. Based on the rest of the furniture, I feel confident that this is by Knoll.