Set of two postmodern italian table lamps by mario bertorelle, from 1980s. these pieces were made during the 1980s in massanzago by jm rmd. dimension "delta" table lamp: h 30 cm (11.81 in.) w 22 cm (8.66 in.) d 6,5 cm (2.56 in.) "delta" is the fourth letter of the greek alphabet. This lamp has the shape of the greek letter. dimension " disco" table lamp: h 27 cm (10.68 in.) w 18 cm (7.09 in.) d 6,5 cm (2.56 in.) mario bertorelle designed several lamps and they are all patented between 1987 and 1992. They were described as “lamp with optical part incorporated in a stem which is slidable on a supporting base”. the name of the manufacturer "jm rdm", the designer "mario bertorelle" and the model "delta" are stamped on the base of each table lamp. the tuscan company j.m. – r.d.m. Srln was founded in 1979 as a manufacturer of articles in plastic materials. It was first named jm illuminazione and was founded by mario jannuzzi (jm). a professional electrician has checked and prepared the piece to operate in us, uk and eu. This piece has an attribution mark, i am sure that it is completely authentic and take full responsibility for any authenticity issues arising from misattribution, european plug (up to 250v).the wiring of this item may be original and might need replacement, if not specified otherwise.