In the early seventies, a three-way battle for the decade's best player was in progress. It seemed the Golden Bear, Johnny Miller, and Tom Weiskopf were fighting toe to toe every week for the honors while players of high caliber like Gary Player and Lee Trevino were holding on to their coattails. Then along came Tom Watson.

Tom Watson brought a powerful upright swing with him, which was also long, balanced, and relatively FAST!
There are so many qualities in the swing of Watson, that it is hard to decide which factor impresses the most.
Possibly the element that separates Tom Watson from the pack more than others is how he creates space.
The spatial factor, or the awareness of the space around you, really starts in the address. You assemble yourself so that you have enough space or room to swing.
In the dynamic part of the swing, the awareness of making a good-sized wheel in the expanse around your body is particularly important.
Yet if you bite off more than you can chew, it will pull you out of center and ruin your chances of making a good shot. Being too close will make it impossible to generate speed.

I watched Watson a ton between '75-79. The thing that stood out most was - apart from all others except Seve and Ian Woosnam - he literally went for everything. I've never seen a player attack as much as he on every shot in every round. Totally fearless. He had an odd drill that he repeated over and over with every club for his practice routine. He would take the club back and "pump" it several times up and down as though he was about to strike the ball then would actually strike the ball. Not sure what the drill accomplished. Any ideas Bill?