Pair of vintage 70s armchairs

Pair of vintage 1970s shell armchairs, in polystyrene, removable blue fabric cover. Seat held by a strap under the shell. Stable hull. Good seat. Some traces of wear linked to time and use. Dimensions: seat height: 37 cm; total height: 62 cm; width: 70cm; seat depth: 40 cm; total depth: 63 cm.