I just got my Seatime back from service in the Fatherland and noticed something strange. There seems to be a piece of gasket or o-ring caught between the crown tube and the case. At first I thought that it was a piece of rubber or debris but it won't come out. I looked up pics of how a crown tube attaches to cases and I can't get any insight on where this piece of rubber is. I am talking about between the tube that the crown screws down on and the case of the watch. I'm wondering if there is a o-ring between the crown tube when it is installed in the case and a piece of it got caught during the installation of the crown tube? Very confused and don't really want to send this watch back because of the cost involved. Any help would be great.