Pair of chairs folded by company

Nice pair of chairs cult of Italian design signed by designer Giancarlo Piretti, published by the House Anonima Castelli (see last photo for authentication, it is real and not a copy) the chassis is in chromed steel tube and articulates with the seat through 3 ball joints that give a good rigidity and strength. Perpex Foundation and records has exactly the same smoke tint two chairs are in good condition. The chrome is sparkly (a few tiny traces of rust on the bottom and underneath the base), the perpex is in good condition with normal signs of use in the form of scratches. A larger stripe (crack?) of 1 cm be noted on one of the folders. But it is almost invisible. They have both their four original pads. It should be noted that one of these pads no longer has the nipple to stay in his place. The price is for the pair