Chairs and table by Umberto Brandigi for Planula, 1960s, set of 5

Very rare dining or gaming set, as I assume, consisting of 4 chairs and a square table, all in beech, designed by Florentine architect Umberto Brandigi at the end of the 1960s. The table top is reversible: one side wood-coloured, the other white. The chairs have the original vinyl leather upholstery with small signs of age, but still in very good condition, usable as originally intended. The wood has no woodworm or obvious chipping on the chairs and table. Table: L83 D83 H72 cm. Chair: L51 D46 H73 cm.