This chair is called THE CHAIR and was made by Hans Wegner for Johannes Hansen of Denmark circa 1949 through 1960*. This chair has a value of $700.00 us dollars.
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*This style of chair was also made by PP Mobler and also reproduced by the Melbourne based furniture maker Danish Deluxe ( Australia) in teak and blackwood from the mid-sixties until 1972. I believe yours is a Hans Wegner piece.