jrwong23 (aka watchthebin)[Moderator]
14255
This happened to some of my other manual winding before too
Not to my Reversos so far but other watches like the Lange 1.
After sending for service the issue stops. My watchmaker told me one of the reason is dry oil. After oiling during servicing, this doesn't happen again. I'm not technical so I took his word for it 
Hope this helps
Cheers
Robin
Yes,
By: Rick.On.Watches : November 17th, 2021-11:39
I’ve owned a Reverso with cal 976 and don’t recall having this “issue”. However, I own a large collection and a couple of my watches (other brands) have the same characteristic, just need a gentle shake to start the movement. Hasn’t bothered me at all. ...
torque
By: golden hands : November 17th, 2021-19:39
the manual/instruction booklet for mine does not state how many turns of the crown are required to start the watch . just to fully wind it-having said that... it does take a lot of winding to get sufficient torque in the mainspring to get to the escapemen...