Ringling Bros. and Barnum & Bailey Circus / The Gibsons Knife Throwing Poster. Erie Litho Co., ca. 1938. Color lithograph of the Gibson’s rotating disc knife throwing act presented by Ringling Bros and Barnum & Bailey. Some toning, minor creases from original folds, grommets in upper corners. Stamped B.L. Wilson verso. Linen backed. B+/B.