THREE VINTAGE COCKTAIL DRESSES,1960s. One, Julius Garfinckel, a-line, knee-length, sleeveless metallic incorporating turquoise and green; one, Gunther Jaeckel, black cap-sleeve shift, calf-length, with satin cross-draping; one, Mari for I. Magnin, black velvet bodice with elboe-length sleeves, knee-length satin circle skirt with pleated velvet panel, separate velvet buckle belt Estimate $150-250