Version #1

From facing pairs or a wave: Ends swing half by the right, centers swing a full turn. Finishes in a wave. (author unknown)

COMMENT: Use "Swing Thru, Centers Trade."

Version #2

From a wave: Ends and adjacent dancers swing half. New centers turn back. Finishes in a two faced line (Equivalent to Centers Run). (Danny Lantz 1975)

COMMENT: Call this directionally also.