Modular wall shelf perforated metal design 1960

Modular wall shelf with 4 perforated metal shelves of different colors. Practical and typical of the design of the annees 60, they are authentic pieces with their original colors. So they have a patina especially on the yellow shelf which is insolated, there are also small gaps of paint on some as shown in my photos. Practical shelf that can also be used as a bookcase.