Delta Sergio Mazza for Artemide italian glass pendant lamp 1960s

Italian midcentury modern design pendant lamp model “delta” small designed by sergio mazza and produced by artemide with nickel-plated brass structure, milk glass diffuser and molded glass bowl, italy 1960s. Bibliography: G. Gramigna, repertoire of italian design 1950/2000 for home furnishings, allemandi turin 2003, p. 84. Please note that the lamps are original of the period and this shows normal signs of age and use.