Left hand rotation through the impact zone

[DOCW3]

Image #2 leaves me with the impression of preparation for an "underhand" toss similar to Ballard's shag bag toss. Image #3 however appears to be the result of a sidearm delivery. If the latter is correct, it would suggest a vertical hinge is required when the ball is released. What is the correct delivery of the "old two-handed basketball pass?"

In a swinger's action, do you believe that the 180 degree rotation of the left hand and clubface from the third parallel position (where the toe is up) to the fourth parallel position (where the toe is up) involves active movements of the upper limbs below elbow level?

Here is how Ben Hogan described the action.

""What is the correct integrated motion the two arms and hands make as they approach the ball and hit through it? What does it feel like as it is happening? Well, if there is any motion in sports which it resembles, it is the old two-handed baseketball pass, from the right side of the body."

He used the following diagram in his book.



Jeff.