6306 6309 7548 7549 crown seal tip

[Fergus]

Do you dive your watch or use it in or near water.

Once fully unscrewed, does the crown pop out to the first stop, without being pulled, with ease. i.e. you here the tell tale click.

It might just be the time to have the crown seal changed.

It's a sign of very little, if any, contact between the O ring seal and the case tube.

[longbike]

Aloha ,

 This seems like a very good to be ....  " Suggested Pre-Caution ), .... for watch's and should be ... Archived too.
For many and especially .... Our Beginner Friends that still want to do it right.

Thank you donj Sir ......  for expressing this.
( Just a suggestion )
Louis