Set of 4 chairs formica imitation wood

Set of 4 chairs 60s: chromed metal base and seat / back in brown formica imitation wood. Seat and backrest are bordered by a black plastic bias (complete, good condition and good hold). Original black plastic tips at the legs of all chairs (wear and tear). Formica surfaces are in good condition. The bases are in variable condition: 2 chairs have a base in good condition (low / limited corrosion) and 2 chairs have the rear legs much more oxidized (see detail photo). Dimensions: w38 X d43 X h79 with seat height 44.5cm.