Tina Jørstian and Poul Erik Munk Nielsen, eds., Light Years Ahead, The Story of the PH Lamp, Copenhagen, 1994, p. 242
Catalogue Essay
Patent application 1927, Introduced at the exhibition 'Modern Homes' in Forum, 1931. It came in two sizes 4 4 1/2/ 4 and 4 3 1/2/3 first digit is the number of shades and the other two the dimensions.
circa 1931 Copper, brass. 45 cm (17 3/4 in) diameter Manufactured by Louis Poulsen, Denmark. Underside of light fixture impressed with ‘P.H.- 5 PATENTED’.