Pénéloppe armchairs (set of 4) by charles pollock for castelli 80's

Series of 4 pénéloppe model armchairs by charles pollock for castelli 1980 these chairs have no marking but are listed in all design books. A true design classic, this american designer developed this revolutionary chair at the time from a technical point of view, a sled base in steel wire supporting the suspended seat for optimal comfort, mesh effect, the armrests are in polyurethane. 1 missing chrome on the edge of a chair (see photo) height 81 cm width 67 cm depth 63 cm seat height 43 cm.