Version #1

From a wave: Step Thru and then as couples Wheel 1/4, 1/2 or 3/4 depending on the call. (Bob Arnold 1968)

Version #2

From parallel waves: All Step Thru and without stopping and joining inside hands, each pair wheels right 180 degrees to form a two faced lines. (Lem Smith 1976)

COMMENT: The same idea by two different authors.