Is this Sub 116610LN Legit?

[4nick8z]

Hi,

I recently got a 2019 116610LN from a friend. He originally got the watch from another friend who supposedly acquired it at retail al a local AD.

I have the box and card. The card matches the serial on the number and it's signed by the local AD. We're in Portugal, so I don't think someone would fake that specific AD.

I compared the box and everything is a match - fakes tend to have poor boxes.

However, there's a thing about the watch that's a little odd - the crown action (it winds perfectly but it grinds when winding very slowly).

The movement also seems to make a small metallic noise when shaking it (seems I'm not the only one who has experienced this).

I'm attaching some pictures. Let me know what you think. Perhaps it only needs a service and polishing.