AN AMSTERDAM SCHOOL DESK-LAMP, possibly designed by Piet Kramer, the rectangular stepped and curved base applied at the top with a coromandel triangular section rim, and with two coromandel frilly rectangles, the hammered copper open cylindrical movable shade with frilly rim, the applied sides with decorative rims, held in two open-work curved copper arms fastened to the base by two butterfly-nuts, apparently unmarked, fitted for electricity