THREE PIECES OF EARLY 20TH CENTURY IRIDESCENT GLAZED ART POTTERY,Early 20th Century. Including Austrian Heliosine, 9 in., pinched-side pot, 5 1/2 in., and ovoid vase, probably by Van Briggle, H. 10 1/2 in. PROVENANCE: Estate of Jim Graham, former Washington, DC, Councilman Estimate $200-300