Lady’s Datejust 6917 crown winding question.

[Amochosto]

Hello, I have searched the internet and this forum for the answer to my question, no concrete success as of yet.

A couple of years ago I bought my wife a used Lady Datejust 6917. Using information found on this amazing site, I have made the following assumptions. The Bracelet has an F identification pointing in the direction of the watch being a 1981 vintage thus a 2035 movement.

I recently bought her an Apple Watch for Christmas and she is now wearing it so I wound her Datejust up and put it on my watchwinder. When I was manually winding it, the crown seemed very tight as in hard to move relative to all my other watches and there was a vibration that felt like a mass moving inside the movement. My guess is the flywheel was spinning as I was winding the watch. My Rolex Explorer II does not have this type of motion when I wind it.

This made me fear that I had bought a fake. Can anyone with knowledge of the 2035 movement confirm or deny that the flywheel or any other moderate mass inside the movement spins when handwinding a 6917 causing a vibration?

I would very truly appreciate any help the from the great expertise assembled on this forum. Thank you for reading my first thread.

[Vicc]

This could be caused if the reversing wheels are failing and the rotor is spinning while you wind the watch. A service should take care of both the spinning and tight winding. Take it in for an estimate and you'll also know if it's real or fake.

[Amochosto]

Good plan, and thank you for your help!