The frame was redeveloped in 1980, with a sleek tubular frame. The shape of the frame is characterised by a trapezoid shape and an L shape which are welded along side each other. The teak wood seat and backrest are both marked with the original type number: "Marko 60:05" Materials: Frame: made of curved, sleek profiles, frame bent to form a trapezoid and an L-shape and welded, powder coated in grey, RAL6015, connected with welds. Seat: teak wood, plywood, brown/red-coloured with four silver-coloured attachment points. Backrest: teak wood, plywood, brown/red-coloured with four silver-coloured attachment points. Seat and backrest type: 60:01 Marko Leg: square plastic cap. black RAL9005 Characteristics Unique design, strong, durable, safe, comfortable, flexible and with a light weight. Tested under current standards: L2, "extreme use", like in terminals, school, prisons, sports clubs, locker rooms.