u/LogosLass

Hello,

I was looking at the caseback of my D5 Auto purchased just a few days ago and noticed there was a black string like rubber on the bottom of the caseback.

I did some research and it might be a dislodged O-Ring gasket. Can anyone confirm?

https://preview.redd.it/4gjg8uxhqhbh1.jpg?width=1308&format=pjpg&auto=webp&s=e47d2d7cc0e1378b6cb5d90a7009a1ce3e256e16