Credits for this issue based upon Alberto Becattini's "Disney Index - Dell Comic Books" Vols. 1 and 2 (Italy, 1992 and 1994). Variant with ad for Kellogg's Corn Flakes' official Huck Hound Club as back cover. Indicia title: "Walt Disney's Daisy Duck and Uncle Scrooge Showboat, No. 55, 1961". Code number D.D.+U.S. SHOWBOAT -619 (blank space where number should be. May have been intended to be a different number.) On sale date is Library of Congress copyright record publication date.