Pair of vintage chairs by Miroslav Navratil for Vertex, antique seating furniture

1950s, design miroslav navratil for the publisher vertex (marking under the seat of each seat). The seat is made of fiberglass and the base is made of black painted metal. Normal signs of use: missing paint on the feet, scratches and dents on the seats. Very comfortable. Blueish gray color. Dimensions 46x55xh80cm, seat 40cm. Eiffel base.