Red glass table lamp designed by stepan tabera for czechoslovakian company opp jihlava in early 1970s. Two layers of glass - white inside and red outside. Bottom base made of brass. 1x60w, e25-e27 bulb us plug adapter included. 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.