No, he did not have a forward swing, or even a forward press. In fact, he advised strongly against doing both, and also did not believe in or teach waggling the club at address. His pre-set set up routine was done in identical motions, and this developed consistency and mental confidence.

I will have to call a friend of mine who took lessons from and played golf often with Count Yogi about the hand and wrist position details you're wondering about. Yogi emphasized that golfers should concentrate on rhythm and balance. His simplified approach and personality either made people love or hate him, is how I figure it.