SeaMaster Crono Crown Problems

[mpg54]

Hi,
I have a SeaMaster Crono 45mm I bought from Hont back in December. The Crown doesn't lock down anymore, you can push in down and turn it, but it will pop back out into the Wind position. What can I do here? Does the Crown need to be replaced? I'm reluctant to open the case up as I'm clueless on fixing it. :thinking:
Recommendations would be greatly appreciated.
Thanks in advance.

 

[fakemaster]

The case tube or crown is stripped. One or both needs to be replaced.

 

[mpg54]

It stripped real easy if that's the problem. Could a local Watch Smith fix it or will I need to ship it to China (not what I want to do)? I'm assuming I'll need to get the parts.