There are two variations of this move found in Yang's Cotton Boxing style (now known as Taijiquan). After another round of kick defense training, I recalled the hand pattern preceding the moves. Here are the two variations from the 108 long form used as a kick defense.

High Pat on Horse. This is from Yang style Tai Chi, or Taijiquan, or Yang’s Cotton Boxing, and quite possibly/most likely, existed back in the Ming dynasty, as evidenced by General Qi’s manual in 1560 where he mentions 24 Throws of Pat Horse, and depicts this posture as one of the techniques in his 32 unarmed combat methods.