Found in England, these high chairs are unique designs from 1955 by Nanna Ditzel, who had twin daughters. You can read all about it here. Meantime, vintage originals are all you will find, and I found these for you! "ND2 children's high chairs were created for the designer's twin daughters... The removable front rail and adjustable footrest make it possible for children to climb into the chair themselves as they grow older."