The Milton High Chair is a classic conference chair, designed by Bruno Mathsson.
It was designed in 1980, making it 30 years old, although it could easily pass for being of an older vintage. Not cheap by any standard at £1,556 for a fabric finish or £2,264 in leather, but if the rest of your world is beautifully furnished, then your office should be too.
Buy it online from the Swedish Design website.