Set of 2 brutalist metal and glass pendant lamps, 1960s

This stunning brutalist pendant lamp is often attributed as a design by finnish designer nanny still-mckinney with manufacturing by raak amsterdam. The true source/designer/manufacturer has never been really revealed with good documentation. Some options are philips and peil und putzler. Nevertheless, have these lights and many other models like it found great appreciation in the 1970s in holland and belgium. The metal always in these colors and the glass that bubbles out, in several colors. It has an oxidized metal shade with blown green glass inserts that give a very nice light effect. One light is in very good condition with hardly any signs of age and use. The second light pictured does have a crack on the inside.