Vintage Plona armchair for Castelli in black leather 1960s

Leather Plona chair designed by Giancarlo Piretti for Castelli in 1969. This folding chair is a family of the famous Plia chair from the same designer. The frame is made of aluminium and the seat of black leather. When it is folded, height: 79 cm. Width: 69 cm. Depth: 24 cm. When it is expanded, height: 73 cm. Width: 69 cm. Depth: 55 cm. The seat height is 47 cm. It is marked by the manufacturer.