Tri Stackable Tables, Italy, 1960s, Set of 3

Trio of coffee tables in brass, lacquered metal and smoked glass, Italian production from around the 1960s.
The main feature is that they can be stacked, so as to save space, they have 3 different sizes.
Good condition, some signs of wear on the structure, see photos.
Dimensions: 1 50x40x42 (H) cm; 2 42x35x38 cm; 3 34x30x36 cm.