Rare set of four dining chairs attributed to Ilmar Lappalainen and produced by Asko, 1960s Finland

Rare set of 4 dining room chairs attributed to the Finnish designer Ilmar Lappalainen and Asko, 1960s Finland. The special chairs have a curved anodized aluminum frame with yellow leatherette seat and backrests. The seats are not marked. The seats bear some resemblance to the Sm0301 by Pastoe / Pierre Mazairac. Good to very good vintage condition. Light signs of wear on the underside of the aluminum legs. Skai leather and filling is in good to very good condition