Two-piece ball gown in blue-purple ribbed silk

Blue-purple ribbed silk ball gown. A: Strapless bodice; top edged with three rows of tucks, top two in matching velvet; center back five covered button, hook and eye closure; cotton twill lining, boned. B: Full-length skirt; self sash; three-tiered ruffled crinolined bustle, rear hem fishtail godet; center back hook and eye closure; horsehair stiffened hem; black silk satin underskirt. Label, A: Christian Dior / Paris / [in ink below] 7327.