Knoll fixed tulip armchair 1960

Knoll fixed tulip armchair from the 2nd series 1960-70. The back covering is green, some stains from time and marks on the foot. Good general condition. Fixing with round velcro, 1 machine pass. The foam is honeycombed. The seat is fixed with visible screws directly fixed in the cast aluminum. Possibility of a set of 2 armchairs at €1950. Timeless design