Little Big Horn, 1959, Peter Voulkos. Polychromed stoneware. 62 x 40 x 40 in. The Oakland Museum of California, gift of the Art Guild in memory of Helen Schilling Stelzner. © Mrs. Ann Voulkos, Voulkos Family Trust. Image courtesy of the Voulkos & Co. Catalogue Project. Photo by Joe Schopplein

Orange Cross, 1963, John Mason. Ceramic with glaze. 64 x 49 x 16 in. Collection of Vernita Mason. © John Mason. Photo by Roxanne Hall Morganti

Red Concave Circle, 1970, De Wain Valentine. Cast polyester resin. 96 x 96 x 12 in. Bank of America Collection. © De Wain Valentine. Photo: Harry Drinkwater

Sonday, 1964, Melvin Edwards. Welded steel. 12 1/2 x 7 x 7 1/2 in. Collection of and © Melvin Edwards. Photo by Kristopher McKay

Tap Dancer, 1967, Stephan von Huene. Wood, metal, and mechanical components. 47 1/4 x 35 7/16 x 29 1/2 in. Collection of Nancy Reddin Kienholz. © Petra von Huene. Photo: Sebastian Hartz

The Future as Afterthought, 1962, Edward Kienholz. Paint and resin on plastic and rubber doll parts with sheet metal, tricycle pedals, and wood. 54 x 21 x 16 15/16 in. Onnasch Collection. © Nancy Reddin Kienholz. Photo courtesy L.A. Louver, Venice, CA

The Librarian, 1960, George Herms. Wooden box, papers, books, loving cup, and painted stool. 57 x 63 x 21 in. Norton Simon Museum, Gift of Molly Barnes. © George Herms

Topanga Seed, 1969–70, Wallace Berman. Dolomite rock and transfer letters. 39 x 40 3/4 x 41 in. Collection of the Grinstein Family. Permission courtesy of the Estate of Wallace Berman and Michael Kohn Gallery, Los Angeles

Untitled, 1970, Frederick Eversley. Three-color, three-layer cast polyester. 20 x 20 x 6 in. Collection of the artist. © Frederick Eversley

Untitled, 1967, Robert Graham. Polyurethane resin. 8 5/16 x 11 7/16 x 11 1/8 in. Collection of Ed Ruscha. © Estate of Robert Graham

Untitled, 1969, Larry Bell. Mineral-coated glass. 40 x 40 x 40 in. Courtesy The Pace Gallery. © Larry Bell. Photo by Ellen Labenski

Untitled, 1969, Helen Pashgian. Cast sphere, color polyester resin. 7 in. diam. Norton Simon Museum, Gift of the artist. © Helen Pashgian

Untitled, 1969, Craig Kauffman. Acrylic lacquer on plastic. 73 x 50 x 9 in. Courtesy the Estate of Craig Kauffman and the Frank Lloyd Gallery. © The Estate of Craig Kauffman

Untitled, 1959, Henry Takemoto. Stoneware with iron and cobalt brushwork. 26 3/4 x 27 3/4 in. Collection of Pier Voulkos. © Henry Takemoto. Photo by Joe Schopplein

Untitled (Leaner), 1970, Peter Alexander. Polyester resin. 104 ½ x 5 ½ x 3 in. Collection of the artist. © Peter Alexander