Blue Iridescent Art Glass centerpiece bowl, low form with rounded sides and footed base. Unsigned. 3 1/4" H x 15 1/4" dia. 20th century. Provenance: The collection of internationally known ragtime pianist and historian Johnny Maddox, Gallatin, TN. CONDITION: Unsigned, overall good condition. Approx. 2" scratch to interior center. General wear to base center.