NEW YORK, NY.- Active bidding by private collectors resulted in a strong auction of American Art and Contemporary Art at Swann Galleries on June 8. The sales top lots, offered in the Contemporary Art section, were Louise Nevelsons Maquette for Monumental Sculpture II, welded black steel, 1977, which sold for $78,000*, and Willem de Koonings The Devil at the Keyboard, lithograph with hand coloring in watercolor and gouache, 1976, $40,800. Highlights of the American Art section included Landscape, oil on canvas, 1883, by African-American artist Edward Mitchell Bannister, $21,600; Childe HassamsLandscape with a Bridge, watercolor, $28,800; and Guy Carlton Wigginss Winter at the Plaza, oil on canvas board, circa 1950s, $31,200. Among choice drawings by Paul Cadmus was Standing Nude, color pastel, $26,400. Topping a selection of works by Jared French was a watercolor Self Portrait, quite possibly