The UNI Senior chair also called chair 4110 is designed by Kai Kristiansen and was a chair designed for Fritz Hansen, which only later - and by later we mean 50 years later - gained the proper attention.
The general idea behind chair 4110 was the flatpack concept. The Chair and it's size were designed so you could fill in a box with two chairs; they took up very little room. When the chair was put together and tightened, it had a sturdy construction. At that time, it wasn't only IKEA who practised the knock-down idea, a lot of manufacturers were interested in being able to save on transport and costs. That was just common sense.
The Chair is now produced by Miyazaki Chair Factory in Japan.