A ceiling lamp model "PH 3/2", Louis Poulsen, Denmark 1930s.
Socket housing and ceiling cup in bakelite, metal shade holder with bayonet spring lock, mounted with 3/2 shades in yellow-painted glass, the socket housing is marked PH lamp Patented and the shade holder is marked PH-2/2 PATENTED. Diameter 28.5 cm.
Wear, chips. Electrical function not guaranteed.
Tina Jørstian & Poul Erik Munk Nielsen, "Tænd! PH lampens historie", Gyldendal 1994, compare p. 177.
The PH model with a bakelite socket house was introduced in 1933.
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