Rare circa 1920's-1930's Edward L. Koenig Sit-Rite adjustable chair stool.
Industrial goodness from Chicago, Illinois.
Comprised of a heavy gauge angled steel base member containing vertically spaced holes used in conjunction with adjustable upright standards having a vertical series of holes adapted to be aligned with the pre-drilled holes in the four-legged base. the spacious saddle seat and slightly contoured backrest are comprised of solid maple wood. manufacturer markings are stamped on the underside of the seat.
Measurements as depicted in photo:
Base 14.75Wx20Dx51H (to top of back)