This set of pendant lamps was designed for kalmar in the 1960s. the lamp is executed with 1x e27 edison screw fit bulb. It is wired and in working condition. It runs both on 110 / 230 volt. light bulbs are not included. it is possible to install this device in all countries (usa, australia, asia, great britain, europe,\.) this piece is attributed to the mentioned designer/maker. It has no attribution mark and no official proof of authenticity, however it is well documented in design history. I take full responsibility for any authenticity issues arising from misattribution, up to 250v (europe/uk standard).the wiring of this item may be original and might need replacement, if not specified otherwise.