Industrial hanging lamp by Philips

Rare lamp from the fifties of the Dutch brand Philips, probably designed by Louis Kalff, the designer for Philips at that time.The lamp is made up of three spots and a 4th spot in the middle, the color is original. The condition is good considering the age, normal wear and tear, also see the detailed pictures. The size is 55 cm in diameter, a spot is 20 cm long and 14 cm in diameter.