So I got me a new Explorer 2010. After servicing the movement I was about to water proof the case. I popped the crystal and than I noticed they glued the tension ring in place... After gently trying to repress the crystal I noticed the tension ring was getting lightly disformed. It was a really tight sqeeze. After that there was no way I could get the crystal in again. I end up prying the tension ring out which resulted in destroying it off course!
I was able to get the following measurement with a digital caliper.
Thick: 0,65 ~ 0,68 mm
Hight: 1,45 ~ 1,50 mm
Diameter: 31,84 ~ 31, 89mm
Now this is the most important part: Where can I buy a new tension ring of this size?
Thanks,
Mark